JP2011198612A - Lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting system excellent in heat radiation.SOLUTION: The lighting system 1 is provided with a substrate 3, a light-emitting body 2 fitted at an underside of the substrate 3, a heat radiation member 4 fitted at an upper side of the substrate 3, and having a first airflow circulation channel 5a and a second airflow circulation channel 5b capable of circulating airflow in up and down directions, a first hood 8 partitioning the heat radiation member 4 so as to contain the first airflow circulation channel 5a inside and second airflow circulation channel 5b outside in plane view, and having an airflow circulation hole 10 capable of circulating airflow at an upper part, a second hood 9 for covering the first hood 8 and the heat radiation member 4 from outside and fitted in separation from the first hood 8, and an airflow generation mechanism 6 for generating at least either an airflow circulating in the first airflow circulating channel 5a inside the first hood 8 or an airflow circulating in the second airflow circulating channel 5b in a gap between an outside of the first hood 8 and an inside of the second hood 9.

Description

  The present invention relates to a lighting device using a light emitting diode as a light emitter.

  In recent years, lighting devices using light emitting diodes (LEDs) as light emitters have been developed. As such an illuminating device, it is disclosed by patent document 1, for example. By the way, in the illuminating device using a light emitting diode as a light emitter, since heat generation of the light emitting diode affects the light emission efficiency, heat dissipation with respect to the heat generation is important, and a technique for that is being developed.

JP 2010-16003 A

  An object of this invention is to provide the illuminating device excellent in heat dissipation.

  An illuminating device according to an embodiment of the present invention includes a substrate, a light emitter, a heat radiating member, a first hood, a second hood body, and airflow generation means. The light emitter is provided on the lower surface side of the substrate. The heat dissipation member is provided on the upper surface side of the substrate, and has a first airflow passage and a second airflow passage through which an airflow can flow in the vertical direction. The first hood divides the heat dissipating member so as to include the first airflow passage on the inner side and the second airflow passage on the outer side in a plan view. It has air circulation holes through which air current can flow. The second hood is provided apart from the first hood so as to cover the first hood and the heat dissipation member from the outside. The air flow generating means includes the second air flow in the first hood and the gap between the outer side of the first hood and the inner side of the second hood. At least one of the airflows flowing through the airflow passage is generated.

  The present invention can provide a lighting device with excellent heat dissipation.

It is an internal outline figure which shows the internal outline of the illuminating device which concerns on this embodiment. It is sectional drawing when the illuminating device shown in FIG. 1 is cut | disconnected by AA. It is a perspective view of the heat radiating member of the illuminating device which concerns on this embodiment. It is a top view of the board | substrate of the illuminating device which concerns on this embodiment. It is a perspective view of the rotary blade of the airflow generation means of the lighting device according to the present embodiment. It is a perspective view of the rotary blade of the airflow generation means of the illuminating device which concerns on this embodiment, (A) And (B) is a perspective view of the rotary blade which varied the angle in the circumferential direction. It is a perspective view of the other rotary blade | wing of the airflow generation means of the illuminating device which concerns on this embodiment. It is a side view of the 1st rotary blade of the airflow generation means shown in FIG. 7, (A) is a side view of the state arrange | positioned in parallel with respect to a rotating shaft, (B) is inclined with respect to a rotating shaft. It is a side view of the state arrange | positioned. It is a side view of the 2nd rotary blade of the airflow generation means shown in FIG. 7, (A) is a side view of the state arrange | positioned in parallel with respect to a rotating shaft, (B) inclines with respect to a rotating shaft. It is a side view of the state arrange | positioned. It is sectional drawing of the illuminating device which concerns on the modification 1 of this embodiment. It is a perspective view of the rotary blade of the airflow generation means of the modification 1. It is a perspective view of the other rotary blade of the airflow generation means of the modification 1. It is sectional drawing of the illuminating device which concerns on the modification 2 which concerns on this embodiment. It is a perspective view of the rotary blade of the airflow generation means of the modification 2. It is a perspective view of the other rotary blade of the airflow generation means of the modification 2. It is sectional drawing of the illuminating device which concerns on the modification 3 which concerns on this embodiment.

  Hereinafter, an illumination device according to an embodiment of the present invention will be described with reference to the drawings.

<Embodiment>
As shown in FIG. 1 or FIG. 2, the lighting device 1 is provided on the substrate 3, the light emitter 2 provided on the lower surface side of the substrate 3, and the upper surface side of the substrate 3. The heat dissipating member 4 having one air flow passage 5a and the second air flow passage 5b, and the first air flow passage 5a on the inner side and the second air flow passage on the outer side in plan view. 5b, so that the heat radiating member 4 is divided and the first hood 8 having the air flow holes 10 through which the air flow can flow and the first hood 8 and the heat radiating member 4 are covered from the outside. A second hood 9 provided to be separated from the first hood 8, an airflow flowing through the first airflow passage 5 a inside the first hood 8, and an outer side of the first hood 8 and a second Air that generates at least one of the airflows flowing through the second airflow passage 5b in the gap with the inside of the hood 0 It includes a generator 6, a.

  The light emitter 2 is made of, for example, a light emitting diode, is connected to a power source through wiring, and emits light in accordance with power supplied from the power source. In plan view, a plurality of light emitters 2 are provided in a line in the radial direction of the substrate 3 at substantially equal intervals on the lower surface side of the substrate 3 made of a circular and insulating material. Moreover, the board | substrate 3 is provided on the chip base 4a which comprises the thermal radiation member 4 mentioned later. In addition, if the illumination intensity as the illuminating device 1 is obtained, the number of the light emitters 2 may be one and the number of the light emitters 2 provided is not limited. Further, a plurality of light emitters 2 may be provided on the substrate 3 at substantially equal intervals in the circumferential direction. A plurality of light emitters 2 may be provided in the radial direction and the circumferential direction.

  The substrate 3 is made of a ceramic material such as an aluminum oxide sintered body, a mullite sintered body, a silicon carbide sintered body, an aluminum nitride sintered body, a silicon nitride sintered body, or a glass ceramic. . Alternatively, the substrate 3 is composed of a composite system in which a plurality of these materials are mixed. Moreover, the thickness of the board | substrate 3 is set to 0.1 mm or more and 1.0 mm or less, for example.

  The substrate 3 is provided with an electrode made of a conductive layer connected to the electrode of the light emitter 2, wiring made of a conductive layer for supplying electric power, and the like. An electrode, wiring, etc. are metal materials, such as copper, silver, gold | metal | money, aluminum, nickel, cobalt, tungsten, molybdenum, or manganese, or those alloys, or the composite material which mixed several materials of these materials, Or it consists of a composite layer of those materials.

  The thermal conductivity of the substrate 3 is set to, for example, 8 (W / m · K) or more and 210 (W / m · K) or less. Note that the shape of the substrate 3 in plan view is not limited to a circular shape, and may be a rectangular shape or the like as long as the substrate 3 fits in the chip base 4a. The heat of the light emitter 2 transmitted to the substrate 3 is effectively dissipated to the chip base 4a made of a metal material.

  The shape of the substrate 3 may be substantially the same as the shape of the heat dissipation member 4 provided on the upper surface side of the substrate 3 as shown in FIG. That is, when the shape of the substrate 3 is viewed in plan, the central portion 3a of the substrate 3 is substantially the same as the shape of the chip base 4a of the heat radiating member 4, and the protruding portion 3b of the substrate 3 is the shape of the heat radiating fin 4b. They are provided approximately the same. The light emitter 2 may be provided in the central portion 3a or the protruding portion 3b of the substrate 3. Moreover, you may provide in the center part 3a and the protrusion part 3b of the board | substrate 3. FIG. The substrate 3 can efficiently arrange a plurality of light emitters 2. Moreover, since the shape of the board | substrate 3 and the heat radiating member 4 is substantially the same, the heat | fever of the light-emitting body 2 transmitted to the board | substrate 3 is effectively thermally radiated from the board | substrate 3 to the chip base 4a and the radiation fin 4b which consist of metal materials, It is dissipated from the heat dissipation member 4 into the air.

  The substrate 3 provided with the light emitter 2 is provided with a lens for condensing light emitted from the light emitter 2, a reflector for reflecting light emitted, and the like. The substrate 3 is bonded onto the chip base 4a of the heat radiating member 4 with a material such as a polymer bonding material or solder containing a heat conductive filler, for example. Moreover, it is preferable that the board | substrate 3 with which the light-emitting body 2 was provided can be replaced | exchanged from points, such as the lifetime of the light-emitting body 2. FIG. That is, it is preferable that a lens, a reflector, and the like are integrated with the substrate 3 on which the light emitter 2 is provided, and the substrate 3 is detachable from the heat radiating member 4. In addition, the light emitter 2, the lens, the reflector, and the like may be integrated with the substrate 3 provided on the heat dissipation member 4, and the substrate 3 may be detachable. Further, a dust filter or the like may be installed on the front surface of the substrate 3 in order to protect the light emitter 2 from external dust.

  The heat dissipating member 4 is provided on the upper surface side of the substrate 3 and includes a chip base 4a and heat dissipating fins 4b as shown in FIG. The chip pedestal 4a is provided at the center of the heat radiating member 4, and the substrate 3 is disposed thereon. In addition, a plurality of heat radiation fins 4b are provided in the peripheral portion of the heat radiation member 4, and are arranged at substantially equal intervals in the circumferential direction on the side surface of the chip base 4a of the heat radiation member 4, and are provided so as to project in the radial direction. Yes.

  Further, the heat radiating member 4 includes an air flow passage 5 serving as a path through which an air flow passes in a portion of the heat radiating fin 4 b of the heat radiating member 4. The airflow passage 5 is a part of the first hood 8 and is divided into a first airflow passage 5a and a second airflow passage 5b through which airflow can flow in the vertical direction. Configured. That is, as shown in FIG. 3, the heat radiating member 4 is provided with a first air flow passage 5a on the inner side of the heat radiating fin 4b on the chip base 4a side and a second air flow passage 5b on the outer side. ing. The first airflow passage 5a has a function of causing the airflow generated inside the first hood 8 to flow in the vertical direction, and the second airflow passage 5b is provided with the first hood 8. The airflow generated in the gap between the outside of the second hood 9 and the inside of the second hood 9 is provided in the vertical direction. The heat radiating member 4 is fixed to the inner side wall portion of the second hood 9.

  Moreover, the radiation fin 4b has a function of efficiently radiating heat generated from the light emitter 2 provided on the substrate 3 from the surface of the radiation fin 4b to the air via the chip base 4a. In addition, the shape of the radiation fin 4b is not limited to a rectangular shape, and may be a shape having a heat radiation effect from the surface of the radiation fin 4b to the outside. The shape of the chip pedestal 4a is not limited to a cylindrical shape, and may be a tapered shape or the like.

Moreover, the heat radiating member 4 is formed into a predetermined shape using a known metal working method such as cutting or punching, for example, an ingot produced by casting a molten metal material into a mold. Moreover, it is preferable that the heat radiating member 4 and the portion below the rotary blade horizontal shaft 6d of the airflow generating means 6 of the first hood 8 are integrally formed of the same material. If it does in this way, while the manufacture and assembly of the thermal radiation member 4 and the 1st food | hood 8 become easy, a number of parts can be reduced. Moreover, when the heat radiating member 4 and the 1st hood 8 are formed separately, both should just be assembled and joined. In the case where the heat radiating member 4 and the first hood 8 are formed separately, a partition portion that divides the first air flow passage 5a and the second air flow passage 5b is provided in the heat radiating member 4 with the first air flow passage 5a. It is provided as a part of the hood 8.

  The chip base 4a and the heat radiating fin 4b constituting the heat radiating member 4 are, for example, a metal material such as aluminum or copper, an alloy containing these metal materials, or a composite material in which sintered tungsten is impregnated with copper. A composite material in which copper is filled in a plurality of through holes provided in copper-impregnated tungsten, or a composite material in which various metals are laminated in layers. Moreover, the heat conductivity of the heat radiating member 4 is set to, for example, 50 (W / m · K) or more and 400 (W / m · K) or less.

  As shown in FIG. 2, the airflow generating means 6 is provided with a plurality of rotating blades 6 a 1 on the same rotating shaft 6 e, and the rotating shaft 6 e is connected to a rotating motor 6 f provided outside the second hood 9. It is constituted by. The air flow generation means 6 may generate an air flow from the inside of the first hood 8 to the region outside the first hood 8 and inside the second hood 9 via the air circulation hole 10. it can.

  As shown in FIG. 5, the rotary blade 6a1 includes a first rotary blade 6b provided inside the rotary blade 6a1, a second rotary blade 6c provided outside the rotary blade 6a1, a first rotary blade 6b, and the first rotary blade 6b. A rotary blade horizontal shaft 6d, a rotary shaft 6e, and a rotary motor 6f are connected to the two rotary blades 6c. The first rotor blade 6b is composed of an upper rotor blade 6b1 and a lower rotor blade 6b2, and the second rotor blade 6c is composed of an upper rotor blade 6c1 and a lower rotor blade 6c2. Further, the first rotary blade 6b and the second rotary blade 6c of the rotary blade 6a1 are formed by molding, assembling, and joining, for example, a metal material made of resin, aluminum, copper, or the like. .

  The airflow generation means 6 is configured by arranging a plurality of rotating blades 6a1 at substantially equal intervals in the circumferential direction. 6A and 6B show the rotating blade 6a1 in a state where the angle is varied in the circumferential direction with respect to the rotating shaft 6e. A plurality of such rotating blades 6a1 are combined. Thus, the airflow generation means 6 can be configured. The airflow generation means 6 has a function of a rotating fan that generates an airflow by the rotation of the rotary blade 6a1.

  The airflow generation means 6 can generate an airflow by rotating the rotary motor 6f to rotate a plurality of rotary blades 6a1 provided on the same rotary shaft 6e. Further, as shown in FIG. 2, the lower portion of the rotating shaft 6e is on the chip pedestal 4a of the heat radiating member 4, and the lower end portion of the rotating shaft 6e is formed of a bearing made of a ceramic material having excellent sliding wear resistance, By adopting a bearing configuration in which a rotation mechanism portion incorporating a bearing is provided on the outer peripheral portion of the shaft, it is possible to suppress the rotation shaft runout of the rotation shaft 6e due to rotation. A known drive power supply can be used as the drive power supply for the rotary motor 6f.

  As shown in FIG. 5, the rotating blade 6a1 of the airflow generation means 6 is arranged so that the rotating blade 6b1 on the upper side of the first rotating blade 6b provided inside the rotating blade 6a1 The rotary blade 6b2 below the first rotary blade 6b is inclined forward with respect to the direction of rotation. Accordingly, when the rotary motor 6f rotates, the airflow generation means 6 causes the heat radiating member 4 as shown by the arrow in FIG. 2 because the first rotary blade 6b is inclined with respect to the direction of rotation. It is possible to generate a suction airflow that becomes an airflow that flows through the first airflow passage 5 a provided in the airflow path and rises from the inside of the first hood 8 toward the airflow hole 10.

Further, as shown in FIG. 5, the rotating blade 6a1 of the airflow generation means 6 is arranged so that the upper rotating blade 6c1 of the second rotating blade 6c provided outside the rotating blade 6a1 The rotary blade 6c2 that is inclined forward and is lower than the second rotary blade 6c extends in a direction perpendicular to the direction of rotation. Accordingly, when the rotary motor 6f rotates, the airflow generation means 6 causes the heat radiating member 4 to move as shown by the arrow in FIG. 2 because the second rotary blade 6c is inclined with respect to the direction of rotation. The second airflow passage 5b provided in the airflow passage 5b flows through the gap between the outer side of the first hood 8 and the inner side of the second hood 9 and flows downward toward the outside of the lighting device 1. Exhalation airflow can be generated.

  That is, as the first rotary blade 6b and the second rotary blade 6c of the rotary blade 6a1 of the airflow generating means 6 rotate, the air circulation hole is formed from the inside of the first hood 8 as indicated by an arrow in FIG. 10, it is possible to generate an air flow from the gap between the outside of the first hood 8 and the inside of the second hood 9 toward the outside of the lighting device 1. That is, it is possible to generate an air flow from the inside of the first hood 8 through the air circulation hole 10 toward the region outside the first hood and inside the second hood. The lighting device 1 is provided with a first hood 8 on the inner side of the lighting device 1, and is separated from the first hood so as to cover the first hood 8 and the heat radiating member 4 from the outer side. 9 is provided.

  Further, the heat generated from the light emitter 2 provided on the substrate 3 is efficiently radiated from the surface of the heat radiating fin 4b to the air via the chip base 4a by the heat radiating fin 4b. When the generated airflow flows through the first airflow passage 5a or the second airflow passage 5b, the heat flow that is released into the air from the radiating fins 4b is forcibly engulfed, and It can be exhausted to the outside. Therefore, the heat dissipated from the radiating fins 4b is effectively dissipated outside the lighting device 1. The first hood 8 and the second hood 9 will be described later.

  In addition, the angle at which the upper rotor blade 6b1 and the lower rotor blade 6b2 of the first rotor blade 6b are inclined forward or backward with respect to the direction of rotation is determined by the rotation of the first rotor blade 6b. It is sufficient that the angle is such that an airflow rising from the inside of the hood 8 toward the air circulation hole 10 can be generated. In addition, the angle at which the upper rotor blade 6c1 of the second rotor blade 6c is inclined forward with respect to the direction of rotation of rotation is determined by the rotation of the second rotor blade 6c and the second outer side of the first hood 8 and the second Any angle that can generate an airflow descending to the outside of the illumination device 1 from the gap with the inside of the hood 9 is sufficient.

  The first rotary blade 6b provided inside the rotary blade 6a1 has an air circulation hole from the inside of the first hood 8 as long as at least the rotary blade 6b2 below the first rotary blade 6b is provided. An airflow rising toward 10 can be generated. In addition, the second rotor blade 6c provided outside the rotor blade 6a1 has at least the outer surface of the first hood 8 and the second rotor blade 6c1 provided that the rotor blade 6c1 located above the second rotor blade 6c is provided. It is possible to generate an airflow that descends toward the outside of the lighting device 1 from the gap between the inside of the second hood 9.

  Moreover, the 1st rotary blade 6b or the 2nd rotary blade 6c of the rotary blade 6a1 may be formed in the shape with a curvature, as shown in FIG. By forming the first rotary blade 6b of the rotary blade 6a1 in a shape having a curvature, the airflow pressure around the rotary blade 6b1 on the upper side of the first rotary blade 6b during rotation is caused by the air flow pressure of the lower rotary blade 6b2. Compared to the airflow pressure in the peripheral portion, the pressure becomes negative, and the flow velocity of the airflow rising from the inside of the first hood 8 toward the air circulation hole 10 can be increased.

The first rotary blade 6b of the rotary blade 6a1 has a cross-sectional shape of the inner wall of the first hood 8 in the first space 7a, and the second rotary blade 6c of the rotary blade 6a1 has By being formed along the cross-sectional view shape of the outer wall on the outside of the first hood 8 of the second space portion 7b or the cross-sectional view shape of the inner wall on the inside of the second hood 9, by substantially contacting each wall, A substantially sealed state can be formed. That is, the rotation locus when the rotary blade 6a1 is rotated can be made to substantially coincide with the shape of the first hood 8 or the second hood 9, thereby forming a substantially sealed state. Accordingly, the airflow generation means 6 passes from the inside of the first hood 8 through the air circulation hole 10 to the outside of the lighting device 1 through the gap between the outside of the first hood 8 and the inside of the second hood 9. It is possible to effectively generate the airflow that heads. Moreover, you may match the shape of the 1st hood 8 or the 2nd hood 9 with the rotation locus when rotating the rotary blade 6a1.

  FIG. 8 shows a side view of the first rotary blade 6b when the rotary blade 6a1 of the airflow generating means 6 shown in FIG. 7 is viewed from the X direction. Although the 1st rotary blade 6b of the airflow generation means 6 is provided in parallel with respect to the rotating shaft 6e as shown to FIG. 8 (A), it is not restricted to this. As shown in FIG. 8B, the first rotary blade 6b may be provided to be inclined with respect to the rotary shaft 6e. Since the 1st rotary blade 6b inclines with respect to the rotating shaft 6e, the airflow of the front surface of the 1st rotary blade 6b of a rotation direction can be pushed up upwards.

  FIG. 9 shows a side view of the second rotary blade 6c when the rotary blade 6a1 of the rotary fan 6 shown in FIG. 7 is viewed from the X direction. Although the 2nd rotary blade 6c of the rotation fan 6 is provided in parallel with respect to the rotating shaft 6e, as shown to FIG. 9 (A), it is not restricted to this. As shown in FIG. 9B, the second rotary blade 6c may be provided inclined with respect to the rotary shaft 6e. Since the 2nd rotary blade 6c inclines with respect to the rotating shaft 6e, the airflow of the front surface of the 2nd rotary blade 6c of a rotation direction can be pushed down below.

  As shown in FIG. 1 or 2, the first hood 8 includes a first air flow passage 5a on the inner side and a second air flow passage 5b on the outer side in plan view. The heat radiating member 4 is divided, and an air flow hole 10 through which an air flow can flow is provided at the top. In addition, a first space portion 7 a in which the first rotary blade 6 b is disposed is provided above the heat dissipation member 4 of the first hood 8. The first hood 8 is made of, for example, a resin or a metal material such as aluminum or copper. The first hood 8 is provided so as to be inclined when viewed in cross section with respect to the second hood 9, and has a bent portion that is bent outward at a lower portion of the first hood 8. .

  As shown in FIG. 1 or FIG. 2, the second hood 9 is provided apart from the first hood 8 so as to cover the first hood 8 and the heat radiating member 4 from the outside. Further, a second space portion 7 b in which the second rotary blade 6 c is disposed is provided between the first hood 8 and the second hood 9. The 2nd food | hood 9 consists of metal materials, such as resin or aluminum or copper, for example. The second hood 9 is formed, for example, in a predetermined shape using a known metal working method such as cutting or punching an ingot produced by casting a molten metal material into a mold.

  Further, the air flow generation means 6 effectively generates an air flow from the inside of the first hood 8 to the area outside the first hood 8 and inside the second hood via the air circulation hole 10. Although the rotary blade 6a of the airflow generation means 6 is provided so that it may generate | occur | produce, it is not restricted to this. The airflow generation means 6 rises from the outside of the lighting device 1 to the gap between the outside of the first hood 8 and the inside of the second hood 9, and goes to the inside of the first hood 8 via the air circulation hole 10. You may provide the rotary blade 6a of the airflow generation means 6 so that the airflow which descends toward it may be formed. That is, the air flow may be generated so that the suction air flow and the discharge air flow are reversed in the lighting device 1.

  With such a configuration, when the lighting device 1 illuminates upward, for example, when illuminating toward the ceiling surface, the heat dissipated in the air from the surface of the radiation fins 4b of the radiation member 4 Since it is a heat flow, it becomes an ascending air current, which effectively dissipates heat in combination with an air current rising from the inside of the first hood 8 toward the outside of the lighting device 1 via the air circulation hole 10. be able to.

According to the present embodiment, the airflow generation means 6 is provided on the inner side of the rotary blade 6a1.
The upper rotor blade 6b1 of the first rotor blade 6b is inclined rearward with respect to the rotation direction, and the lower rotor blade 6b2 of the first rotor blade 6b is inclined forward with respect to the rotation direction. is doing. Further, the upper rotating blade 6c1 of the second rotating blade 6c provided outside the rotating blade 6a1 is inclined forward with respect to the direction of rotation, and the lower rotating blade of the second rotating blade 6c. 6c2 extends in a direction perpendicular to the direction of rotation. Accordingly, when the rotary motor 6f rotates, the airflow generating means 6 is air-flowed from the inside of the first hood 8 by the first rotary blade 6b and the second rotary blade 6c as shown by arrows in FIG. Via the flow hole 10, it is possible to generate an air flow toward the region outside the first hood 8 and inside the second hood 9.

  The heat radiating member 4 efficiently dissipates heat generated from the light emitter 2 provided on the substrate 3 from the surface of the heat radiating fins 4b to the air via the chip base 4a. Since the airflow generation means 6 generates an airflow from the inside of the first hood 8 to the area inside the second hood 9 outside the first hood 8 via the air circulation hole 10, When flowing through the first air flow passage 5a or the second air flow passage 5b, the heat flow released from the heat radiating fins 4b into the air is forced and effectively released to the outside of the lighting device 1. can do. Therefore, the temperature rise of the illuminating device 1 and the temperature rise of the light emitter 2 itself due to the heat generation of the light emitter 2 can be suppressed. That is, by providing the airflow generation means 6 inside the lighting device 1, the lighting device 1 including the light emitter 2 can be effectively cooled.

  In addition, the first hood 8 of the lighting device 1 is provided to be inclined with respect to the second hood 9 in a cross-sectional view, and a bent portion that bends outward at the lower portion of the first hood 8. Have. Therefore, the heat flow dissipated to the outside of the lighting device 1 is generated from the inside of the first hood 8 toward the air circulation hole 10, the outside of the first hood 8, and the inside of the second hood 9. It is possible to suppress merging near the lower part of the gap and mixing together. A bent portion that is bent so as to be substantially perpendicular to the side wall of the second hood 9 so that the airflow discharged from the gap between the outer side of the first hood and the inner side of the second hood 9 flows in the lateral direction. Is preferably formed.

  The present invention is not limited to the above-described embodiments, and various changes and improvements can be made without departing from the scope of the present invention. Hereinafter, modifications of the present embodiment will be described. In addition, about the photoelectric conversion apparatus which concerns on the modification of this embodiment, about the part similar to the illuminating device 1 which concerns on this embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted suitably.

<Modification 1>
The lighting device 1 according to the present embodiment includes first rotary blades 6b1 and 6b2 provided inside the rotary blade 6a1, second rotary blades 6c1 and 6c2, provided on the outside, a rotary shaft 6e, and a rotary motor 6f. However, it is not limited to this. As shown in FIG. 10 or FIG. 11, the airflow generation means 6 may be a lighting device 1a that is composed of rotating blades 6a2 and includes first rotating blades 6b1 and 6b2, a rotating shaft 6e, and a rotating motor 6f. . Further, as shown in FIG. 12, the first rotary blades 6b1 and 6b2 may be formed with a curvature.

  The rotary blade 6a2 of the airflow generation means 6 is such that the upper rotary blade 6b1 of the first rotary blade 6b is inclined backward with respect to the direction of rotation, and the lower rotary blade 6b2 of the first rotary blade 6b is Inclined forward with respect to the direction of rotation. Accordingly, when the rotary motor 6f rotates, the airflow generation means 6 flows through the first airflow passage 4a provided in the heat radiating member 4 by the first rotary blade 6b and enters the inside of the first hood 8. The air flow rising toward the second hood 9 through the air circulation hole 10 can be generated. That is, a suction airflow can be generated.

Only the airflow rising toward the second hood 9 from the inside of the first hood 8 via the air circulation hole 10 is generated by the first rotary blade 6b. However, the air flow hole 10 provided in the upper part of the first hood 8 becomes an escape route for the rising airflow, and the airflow generation means 6 is located inside the first hood 8 as shown by an arrow in FIG. From the gap between the outer side of the first hood 8 and the inner side of the second hood 9 through the air circulation hole 10, an air flow directed to the outside of the lighting device 1a can be generated. Accordingly, when the airflow generated in the lighting device 1a flows through the first airflow passage 5a or the second airflow passage 5b, the heat flow released from the heat radiating member 4 into the air is compulsory. It is possible to effectively release the light to the outside of the lighting device 1a, and to suppress the temperature rise of the lighting device 1a and the temperature rise of the light emitting body 2 itself due to the heat generation of the light emitting body 2. That is, by providing the airflow generation means 6 inside the illuminating device 1a, the illuminating device 1a composed of the light emitter 2 can be effectively cooled.

  Since the airflow generation means 6 is composed of the first rotary blade 6b of the rotary blade 6a2, the number of parts can be reduced. Further, during rotation, the airflow pressure in the periphery of the upper rotor blade 6b1 of the first rotor blade 6b2 of the rotor blade 6a2 becomes negative compared to the airflow pressure in the periphery of the lower rotor blade 6b2, and the first hood The flow velocity of the airflow rising from the inside of the airflow toward the air circulation hole 10 can be increased.

<Modification 2>
In the illuminating device 1 according to this embodiment, the first rotary blades 6b1 and 6b2 provided inside the rotary blade 6a1, the second rotary blades 6c1 and 6c2, the rotary shaft 6e, and the rotary motor provided outside the rotary blade 6a1. Although it is comprised from 6f, it is not restricted to this. As shown in FIG. 13 or FIG. 14, the airflow generation means 6 may be a lighting device 1b that includes rotating blades 6a3 and includes second rotating blades 6c1 and 6c2, a rotating shaft 6e, and a rotating motor 6f. . Further, as shown in FIG. 15, the first rotor blade 6c1 may be formed with a curvature.

  As for the rotary blade 6a3 of the airflow generation means 6, the rotary blade 6c1 on the upper part of the second rotary blade 6c is inclined forward with respect to the direction of rotation. Accordingly, when the rotary motor 6f rotates, the airflow generation means 6 flows through the second airflow passage 3b provided in the heat radiating member 4 by the first rotary blade 6c and is outside the first hood 8. And an air flow descending from the gap between the second hood 9 and the inside of the second hood 9 toward the outside of the lighting device 1b. That is, a discharge airflow can be generated.

  Only the airflow descending from the gap between the outside of the first hood 8 and the inside of the second hood 9 toward the outside of the lighting device 1b is generated by the second rotary blade 6c. However, due to the discharged airflow generated by the second rotor blade 6c, the airflow generating means 6 is connected to the first airflow from the inside of the first hood 8 via the air circulation hole 10 as indicated by an arrow in FIG. It is possible to generate an air flow from the gap between the outside of the hood 8 and the inside of the second hood 9 to the outside of the lighting device 1b. Therefore, when the airflow generated inside the lighting device 1b flows through the first airflow passage 5a or the second airflow passage 5b, the heat flow released from the heat dissipation member 4 into the air is involved. The heat can be effectively radiated to the outside of the illuminating device 1b, and the temperature rise of the illuminating device 1b and the temperature rise of the illuminating body 2 itself due to the heat generation of the illuminating body 2 can be suppressed. That is, by providing the airflow generation means 6 inside the lighting device 1b, the lighting device 1b made of the light emitter 2 can be effectively cooled.

  Since the airflow generation means 6 is composed of the second rotary blade 6c of the rotary blade 6a3, the number of parts can be reduced.

<Modification 3>
As shown in FIG. 16, the lighting device 1 according to the present embodiment is attached to, for example, an attachment hole 12 provided in the ceiling. An extending portion 11 extending to the outside of the second hood 9 is provided at the lower portion of the second hood 9 on the opposite side of the rotary motor 6f. The extending portion 11 has a function as a fixing member that fixes the lighting device 1 to the mounting hole 12. The illuminating device 1 may be fixed to the ceiling surface with a screw using a screw hole of the extending portion 11. Moreover, when the illuminating device 1 illuminates upward, the extending part 11 may be provided and attached to the upper part of the second hood 9 on the rotary motor 6f side.

  Since the airflow generation device 6 is provided inside the lighting device 1, when the lighting device 1 is embedded in a mounting hole on the wall surface or ceiling surface, or when the lighting device 1 is placed on a projecting portion from the wall surface or the like, illumination is performed. Only by attaching the device 1 to the attachment hole or the protruding portion, a new space for heat dissipation is not required, and the heat generated from the light emitter 2 can be effectively radiated.

  In addition, the air flow generating means 6 may generate an air flow from the inside of the first hood 8 through the air circulation hole 10 toward the region outside the first hood and inside the second hood. Therefore, the heat flow released from the heat radiating member 4 into the air can be forcedly and effectively discharged to the outside of the lighting device 1. Moreover, since the heat transfer to the wall surface, ceiling surface, etc. resulting from the temperature rise of the illuminating device 1 can be reduced, the temperature rise of a wall surface, a ceiling surface, etc. can be suppressed.

DESCRIPTION OF SYMBOLS 1, 1a, 1b Illuminating device 2 Light-emitting body 3 Board | substrate 3a Board | substrate center part 3b Projection part 4 of board | substrate Radiation member 4a Chip base 4b Radiation fin 5 Airflow ventilation path 5a Flow passage 6 Airflow generating means 6a1, 6a2, 6a3 Rotor blade 6b First rotor blade 6b1 Upper rotor blade 6b2 of first rotor blade Lower rotor blade 6c of first rotor blade Second rotor blade 6c1 Rotor blade 6c2 above the second rotor blade rotor blade 6d below the second rotor blade rotor blade horizontal shaft 6e rotor shaft 6f rotor motor 7a first space portion 7b second space portion 8 first hood 9 first 2 hood 10 Air circulation hole 11 Extension part 12 Mounting hole

Claims (7)

A substrate,
A light emitter provided on the lower surface side of the substrate;
A heat dissipating member which is provided on the upper surface side of the substrate and has a first air flow passage and a second air flow passage through which an air flow can flow in the vertical direction;
In plan view, the heat radiating member is divided so as to include the first air flow passage on the inner side and the second air flow passage on the outer side, and an air flow capable of flowing an air flow on the upper part. A first hood having a hole;
A second hood provided apart from the first hood so as to cover the first hood and the heat dissipation member from the outside;
The second airflow passage is circulated by the airflow flowing through the first airflow passage inside the first hood and the gap between the outer side of the first hood and the inner side of the second hood. An air flow generating means for generating at least one air flow of
An illumination device comprising: The lighting device according to claim 1,
The airflow generating means travels from the inside of the first hood to the air circulation hole and from the gap between the outside of the first hood and the inside of the second hood to the outside of the lighting device. An illumination device that generates at least one of air currents. 3. The lighting device according to claim 1, wherein the air flow generation unit is disposed on the outer side of the first hood through the air circulation hole from the inner side of the first hood and the first hood. An illuminating device that generates an airflow toward an inner region of the hood. A lighting device according to any one of claims 1 to 3,
The air flow generating means has a rotating blade provided with at least one of a first rotating blade and a second rotating blade provided outside the first rotating blade on the same rotating shaft. Lighting device It is an illuminating device in any one of Claim 1 thru | or 4, Comprising:
The lighting device according to claim 1, wherein the first rotating blade and the second rotating blade of the rotating blade have at least a rotating blade inclined forward with respect to the rotation direction. It is an illuminating device in any one of Claim 1 thru | or 5, Comprising:
The first hood is provided to be inclined with respect to the second hood in a cross-sectional view,
An illuminating device having a bent portion that is bent outward at a lower portion of the first hood. It is an illuminating device in any one of Claim 1 thru | or 6, Comprising:
The first rotary blade has a cross-sectional shape of an inner wall of the first hood that forms the first space,
The second rotor blade is formed along a cross-sectional view shape of an outer wall on the outer side of the first hood forming the second space portion or a cross-sectional view shape of an inner wall on the inner side of the second hood. A lighting device characterized by that.

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