JP6241722B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture using a light emitting element such as an LED (Light Emitting Diode). In particular, the present invention relates to a lighting fixture having a heat dissipation structure in which a light source unit having a light emitting element is cooled by a plurality of air cooling fans.

  In recent years, from the viewpoint of energy saving, as a light source that replaces an incandescent bulb, a lighting fixture that uses an LED, which is one of light emitting elements, as a light source has been proposed. For example, as an example of a lighting fixture using LEDs, a lighting device including a light source unit, a fixture 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 the heat radiating unit An instrument is disclosed (Patent Document 1). In this lighting fixture, the airflow blown out from the air cooling fan directly cools the heat dissipating part, so that it has excellent cooling performance.

  And in such a lighting fixture, it is described in patent document 1 that it is calculated | required to improve the reliability of an air cooling fan.

JP 2012-226960 A

  However, a high-luminance / high-output lighting fixture usually adopts a configuration in which the light source unit is accommodated in a plurality of fixtures to increase the luminance. In this case, if even one air cooling fan fails, the cooling performance of a specific light source is remarkably deteriorated, so that the failure rate of the luminaire itself tends to increase. On the other hand, in order to reduce the failure rate of the lighting fixture, it is necessary to further improve the reliability required for the air cooling fan, which is a major design issue.

  The present invention has been made in view of the above circumstances, and aims to improve the reliability of a lighting fixture in a lighting fixture having a heat dissipation structure in which a light source unit having a light emitting element is cooled by a plurality of air cooling fans. To do.

In order to achieve the above object, a lighting apparatus according to one embodiment of the present invention includes a housing, a first air cooling fan and a second air cooling fan, a base joined to the housing, and the base to the inside of the housing. A heat sink having projecting heat radiation fins, and a light emitting module having a light emitting element that is thermally coupled to the base of the heat sink and emits light toward the outside of the housing. The first opening is opened, and the second opening and the third opening are respectively opened on the opposite side of the first opening with the radiating fin interposed therebetween. The first air cooling fan and the second air cooling fan are The two openings selected from the first opening, the second opening, and the third opening are respectively attached with the blowing direction toward the outside of the housing.
lighting equipment.

In another aspect, the first air cooling fan may be attached to the second opening, and the second air cooling fan may be attached to the third opening.
The lighting fixture according to claim 1.
In another aspect, the first air cooling fan may be attached to the first opening, and the second air cooling fan may be attached to the third or third opening.

  In another aspect, when the first air cooling fan stops operating, the air that has entered the housing from the first opening is moved from the third opening to the housing by the second air cooling fan. When the second air cooling fan is discharged to the outside and the operation of the second air cooling fan is stopped, the air that has entered the housing through the first opening is moved from the second opening to the outside of the housing by the first air cooling fan. The structure discharged | emitted may be sufficient.

  According to another aspect, the housing includes a top plate, a bottom plate, and a side plate, the first opening is opened in the top plate, and the bottom plate overlaps the first opening in plan view. A fourth opening is formed, and the base of the first heat sink is inserted into the fourth opening, and the light emitting module is disposed on the lower surface of the base of the heat sink with the light emitting element facing downward. The structure may be configured such that the air that is present in the four openings and enters the housing from the first opening hits a region located above the light emitting module at the base of the heat sink.

In another aspect, the heat dissipating fins may be in a region surrounding the first opening in plan view.
In another aspect, the internal pressure of the housing may be lower than the external pressure when the first or second air cooling fan is operating.
According to another aspect, the first heat sink has a cover portion that is provided around the first light emitting module so as to surround the first light emitting module, and the first air cooling fan causes the first heat cooling fan to surround the first light emitting module. Either the exhaust discharged to the outside of the casing through the two openings or the exhaust discharged to the outside of the casing through the third opening by the second air cooling fan hits the cover It may be.

  In another aspect, when the heat sink is a first heat sink, the heat dissipating fin is a first heat dissipating fin, the light emitting element is a first light emitting element, and the light emitting module is a first light emitting module, A second heat sink having a joined base, a second heat radiating fin projecting from the base into the housing, and a second light emission that is thermally coupled to the base of the second heat sink and emits light toward the outside of the housing A second light emitting module having an element, and the casing is in the vicinity of the second heat radiation fin of the second heat sink and opposite to the second and third openings with the second heat radiation fin interposed therebetween. May have a configuration in which a fifth opening is opened.

  In another aspect, when the first air cooling fan stops operating, the air that has entered the housing through the fifth opening is moved from the third opening to the housing by the second air cooling fan. When the second air cooling fan is discharged to the outside and the second air cooling fan is stopped, the air that has entered the housing from the fifth opening is discharged from the second opening to the outside of the housing by the first air cooling fan. It may be a configuration.

  In another aspect, the housing includes a top plate, a bottom plate, and a side plate, the first and fifth openings are in the top plate, and the bottom plate has a plan view with the first opening. A fourth opening is formed at a position overlapping with the fifth opening, a sixth opening is formed at a position overlapping with the fifth opening in plan view, the base of the first heat sink is formed in the fourth opening, and the sixth opening is formed with the above-mentioned The bases of the second heat sinks are respectively inserted, and the first light emitting module is present in the fourth opening on the lower surface of the base of the first heat sink with the first light emitting elements facing downward, The air that has entered the housing from one opening hits a region located above the first light emitting module in the base of the first heat sink, and the second light emitting module faces the second light emitting element downward. Under the base of the second heat sink The air that exists in the sixth opening above and enters the housing from the fifth opening may hit a region located above the second light emitting module at the base of the second heat sink. .

In another aspect, the first radiating fin is in a region surrounding the first opening in a plan view, and the second radiating fin is in a region surrounding the fifth opening in a plan view. It may be.
In another aspect, the second and third openings are formed in the bottom plate, the first air cooling fan is located at a position overlapping the second opening in plan view, and the second air cooling fan is The structure which exists in the position which overlaps with the said 3rd opening in planar view may be sufficient.

In another aspect, the bottom plate, the second, third, fourth, and sixth openings are circular, and the centers of the second and third openings are centered on the center of the bottom plate. The center of the fourth and sixth openings may be on the arc of another virtual circle centered on the center of the bottom plate.
In another aspect, the first and second heat sinks may be thermally coupled by a thermally conductive member.

  In another aspect, the second opening is provided with a first lid that closes when the first fan is opened and stopped when the first fan is in operation, and the third opening is closed when the second fan is opened and is closed when the first fan is stopped. The structure by which 2 lid | covers are arrange | positioned may be sufficient.

  According to the lighting fixture which is one embodiment of the present invention, in the lighting fixture having a heat dissipation structure in which the light source unit having the light emitting element is cooled by a plurality of cooling fans, the entire fixture is operated even if some of the cooling fans fail. Redundant operation without any problem can be realized. Therefore, the reliability of the lighting fixture can be improved.

It is the perspective view which looked at the lighting fixture 1 concerning embodiment from diagonally downward. It is the perspective view which looked at the lighting fixture 1 concerning embodiment from diagonally upward. It is the perspective view which looked at the lighting fixture 1 concerning embodiment from diagonally upward in the state which removed the upper housing | casing. It is a disassembled perspective view of the lighting fixture 1 concerning embodiment. It is a perspective sectional view of light source unit 100 of lighting fixture 1 concerning an embodiment. It is a figure which shows the light emitting module 20 which concerns on the lighting fixture 1 concerning embodiment, Comprising: (a) is a top view, (b) is a front view, (c) is a right view. It is sectional drawing which shows the internal structure of the bearing of the air cooling fan 40 of the lighting fixture 1 concerning embodiment. It is a top view in the state where the upper housing | casing was removed for the lighting fixture 1 concerning embodiment. It is sectional drawing which cut | disconnected the lighting fixture 1 concerning embodiment by the cross section AA shown in FIG.2 and FIG.3, Comprising: (a) is whole sectional drawing, (b) is an expanded sectional view of the D section in (a). FIG. It is the perspective sectional view which cut the lighting fixture 1 concerning embodiment by the cross section AA shown in FIG.2 and FIG.3. It is the schematic which shows the flow of the air in the housing | casing 10 of the lighting fixture 1 concerning embodiment, Comprising: (a) is the state in which all the air-cooling fans 40 operate | move normally, (b) is a part of The air cooling fan is stopped. It is a partial sectional side view of the lighting fixture concerning the modification 1, Comprising: (a) is a sectional side view of the air-cooling fan 40 vicinity, (b) is a sectional side view of the heat sink 30. It is a top view of the lighting fixture concerning the modification 2, Comprising: (a) is the state which removed the upper housing | casing 11, (b) is the state which stopped the operation | movement by the air cooling fan 41 having failed. It is the schematic of the air-cooling fan of the lighting fixture concerning the modification 3, Comprising: (a) shows the state which the cover part closed, (b) shows the state which the cover part opened.

<< Embodiment >>
Hereinafter, a lighting fixture according to one embodiment of the present invention will be described with reference to the drawings.
<Outline configuration>
FIG. 1 is a perspective view of a luminaire 1 according to an embodiment as viewed obliquely from below, and light is emitted in a forward direction indicated by an arrow Y in the figure. FIG. 2 is a perspective view of the luminaire 1 as viewed obliquely from above. FIG. 3 is a perspective view of the luminaire 1 as viewed obliquely from above with the upper housing removed. FIG. 4 is an exploded perspective view of the lighting fixture 1. Each figure shows coordinate axes. In this specification, “upper” means the positive direction of the Z-axis and “lower” means the negative direction of the Z-axis.

  As shown in FIG. 1, the lighting fixture 1 includes an upper housing 11 and a lower housing 12 that constitute the housing 10, light source units 101, 102, 103, and air cooling fans 41, 42, 43. Each light source unit constitutes a lighting device. Further, a circuit unit (not shown) for supplying power to each of the light source units 101, 102, 103 is provided. Each light source unit 101, 102, 103 includes heat sinks 31, 32, 33 and light emitting modules 21, 22, 23. In the following description, the light source unit 100 and the air cooling fan 40 will be referred to as the light source unit 100 and the air cooling fan 40 unless they are distinguished from each other. Similarly, when a plurality of heat sinks and light emitting modules are not distinguished from each other, they are denoted as a heat sink 30 and a light emitting module 20.

The external appearance of the luminaire 1 is mainly composed of an upper housing 11 and a lower housing 12, and the external shape is a disk shape.
As shown in FIG. 2, the lighting fixture 1 is mounted using screws 114 from the lower surface side of the ceiling, which is a construction material, and light is emitted downward from the lighting fixture 1.
The total luminous flux emitted from the luminaire 1 is preferably 100 W for each light source unit 100, or more than the luminous flux equivalent to the incandescent lamp 300 W as a whole. That is, the total luminous flux emitted from the luminaire 1 is preferably 1500 lumens (lm) or more.

<Configuration of each part>
(Light source unit)
FIG. 5 is a perspective sectional view of the light source unit 100 of the lighting fixture 1. In the following description, the names of members and portions common to each light source unit are denoted by x indicating the number (1, 2, 3) of the light source unit. As described above, each light source unit 100 includes the heat sink 30 and the light emitting module 20.

[Light emitting module]
As shown in FIG. 5, the light emitting module 20 has a configuration in which a light emitting unit 2x2 is provided on a substrate 2x1. A wiring 2x3 for supplying power to the light emitting element 2x2a of the light emitting unit 2x2 is connected to the substrate 2x1.
6A and 6B are diagrams illustrating a light-emitting module 20 according to one embodiment of the present invention, in which FIG. 6A is a plan view, FIG. 6B is a front view, and FIG. 6C is a right side view. As shown in FIG. 2A, the light emitting module 20 includes a substrate 2x1, a light emitting element 2x2a, a sealing member 2x2b, a pair of terminal portions 2x4, and a wiring 2x3. The light emitting element 2x2a and the sealing member 2x2b constitute a light emitting unit 2x2. The light emitting element 2x2a and the sealing member 2x2b may be single or plural.

The substrate 2x1 has, for example, a substantially rectangular plate shape, and has a two-layer structure of an insulating layer made of a ceramic substrate or a heat conductive resin and a metal layer made of an aluminum plate. A plurality of light emitting elements 2x2a are mounted on the upper surface of the substrate 2x1.
The plurality of light emitting elements 2x2a are arranged, for example, so that six linear elements arranged in 18 light emitting elements 2x2a are arranged in parallel. Each light emitting element 2x2a is, for example, an LED that emits blue light having a peak wavelength of 450 nm or more and 470 nm or less, and is mounted face-up on the upper surface of the substrate 2x1 using COB (Chip on Board) technology. The light-emitting element according to the present invention is not limited to an LED that emits blue light having a peak wavelength of 450 nm or more and 470 nm or less, and may be an LED that emits blue light having a wavelength other than that. The LED may emit colored visible light or ultraviolet light. Moreover, the light emitting element according to the present invention is not limited to an LED, and may be, for example, an LD (laser diode) or an EL element (electric luminescence element).

  Each sealing member 2x2b is made of, for example, a translucent material, and seals the light emitting elements 2x2a separately for each element row. Examples of the translucent material include silicone resin, epoxy resin, fluorine resin, silicone-epoxy hybrid resin, urea resin, and the like. Each sealing member 2x2b has, for example, a long external shape, and as shown in FIGS. 6 (a) and 6 (b), both end portions in the longitudinal direction are substantially quadrangular, and from FIG. 6 (c) As can be seen, the shape of the cross section cut by a virtual plane orthogonal to the longitudinal direction is substantially semi-elliptical. The shape of the sealing member 2x2b is not limited to a long shape and is arbitrary.

  Each sealing member 2x2b includes a wavelength conversion material in a translucent material and functions as a wavelength conversion member. Examples of the wavelength conversion material include phosphors. For example, the phosphor converts the blue light of the light emitting element 2x2a into green light having a peak wavelength of 535 nm or more and 555 nm or less. In this case, white light is obtained from the light emitting module 20 by mixing the unconverted blue light and the converted green light. Note that phosphors that convert the wavelength to light having a peak wavelength of 535 nm or more and 555 nm or less include oxynitride phosphors, oxynitride phosphors, sulfide phosphors, silicate phosphors having a sialon structure, and phosphors thereof. The mixture etc. which mixed 2 or more types of bodies are mentioned.

The pair of terminal portions 2x4 are part of the conductor pattern formed on the substrate 2x1, and as shown in FIG. 6A, are formed on the peripheral portion of the upper surface of the substrate 2x1, and the lead wire 2x3 is the terminal portion 2x4. Is electrically connected. A connector 2x3a is attached to the tip of the lead wire 2x3.
[heatsink]
As shown in FIG. 5, the heat sink 30 has a substantially circular plate-like base 3x1 and a plurality of heat radiation fins 3x2 erected on the upper surface 3x1a of the base 3x1, and is transmitted from the light emitting module 20 via the base 3x1. Plays a role in releasing heat into the atmosphere.

On the lower surface 3x1b of the base 3x1, the substrate 2x1 of the light emitting module 20 is bonded to the base 3x1 with, for example, a high thermal conductivity adhesive, and the substrate 2x1 and the base 3x1 are thermally coupled. .
In the heat radiation fin 3x2, a plurality of heat radiation plates are provided in a radial manner in the surrounding area 3x1d that surrounds the central area 3x1c in a donut shape in the upper surface 3x1a of the base 3x1, and the heat radiation fins 3x2 are disposed above the central area 3x1c of the base 3x1. The air passage 3x1e which does not exist is made. A conical convex portion 3x1f is formed in the central region 3x1c of the upper surface 3x1a of the base portion 3x1. As shown in FIG. 5, the central region 3x1c is located in a region overlapping the substrate 2x1 of the light emitting module 20 in the base 3x1 in plan view. As shown in FIG. 2, the central region 3x1c is also referred to as intake holes 111a1, 111a2, and 111a3 (hereinafter referred to as 111ax when no distinction is required) formed in a top plate 111 of the upper casing 11 described later. It arrange | positions so that it may overlap in planar view. In the heat radiating fins 3 x 2, a plurality of heat radiating plates are arranged in a radial manner in the surrounding area 3 x 1 d of the upper surface 3 x 1 a of the base 3 x 1, and the heat radiating plates extend to the inner surface of the top plate 111 of the housing 10. Thus, the heat radiating fins 3x2 are arranged so that a part of the heat radiating fins 3x2 is positioned in the vicinity of the air intake holes 111ax so as to surround the air intake holes 111ax in a plan view.

  As shown in FIG. 5, the heat sink 30 includes a cover portion 3x3 that is provided on the outer periphery of the lower surface 3x1b of the base portion 3x1 and extends downward from the base portion 3x1. By inserting the outer periphery of the cover portion 3x3 into mounting holes 121b1, 121b2, 121b3 (hereinafter, referred to as 121bx when it is not necessary to distinguish), the light source is inserted into the bottom plate 121 of the lower housing 12 described later. The unit 100 is fixed to the housing 10. Further, the cover portion 3x3 plays a role of reflecting light emitted from the light emitting module 20 downward.

In the surrounding area 3x1d of the base portion 3x1, a hole 3x1g is formed for leading upward through the wiring 2x3 drawn from the light emitting module 20.
(Air cooling fan)
The air cooling fan 40 has a rotating blade composed of a plurality of blades. The air cooling fan 40 is a so-called axial flow type fan, and sucks air from the axial direction of the rotor and blows it in the axial direction according to the rotation of the rotor of a motor (not shown). The air cooling fan 40 has exhaust holes 121 a 1, 121 a 2, 121 a 3 (hereinafter referred to as 121 ax when it is not necessary to distinguish) opened in a bottom plate 121 of the lower housing 12 to be described later with the blowing direction directed downward. It is attached to the bottom plate 121 so as to be in an overlapping position in a plan view, and plays a role of exhausting the air in the housing 10 downward to the outside of the housing 10. In addition, about the name of the member and part which are common in the some air cooling fan 40, x which shows the number (1, 2, 3) of the air cooling fan 40 is attached | subjected and described.

The air cooling fan 40 is fixed to the bottom plate 121 of the lower housing 12 by screws 413, 423, and 433. The air cooling fan 40 is electrically connected to a lead wire 4x1 for supplying electric power for driving the motor. A connector 4x1a is attached to the tip of the lead wire 4x1.
FIG. 7 is a cross-sectional view showing the internal structure of the bearing of the air cooling fan 40 of the lighting fixture 1. As shown in FIG. 7, the lower end of the shaft 4x1 of the rotary wing having the flange-shaped end is accommodated in the housing 4x2a of the bearing 4x2, and is sealed by the seal 4x2b. The bearing 4x2 is a sintered oil-impregnated bearing, and the housing 4x2a is formed by impregnating a lubricating material with a porous material such as a sintered metal or a synthetic resin. In the axial-flow type air cooling fan 40, when the blowing direction is directed downward, the posture is as shown in FIG. In this way, since the seal 4x2b is positioned above, the lubricating oil does not leak from the joint between the seal 4x2b and the housing 4x2a. Therefore, the life of the air-cooling fan 40 is improved by operating the blowing direction downward. In the air cooling fan 40, lubricating oil is used for the bearing portion, and the service life becomes longer as the operating temperature is lower. Therefore, by using the air cooling fan 40 at a low temperature, it is possible to ensure the same life as the LED light source.

(Casing)
As shown in FIG. 4, the housing 10 includes an upper housing 11 and a lower housing 12, and an outer peripheral end of the disk-shaped upper housing 11 is connected to an outer peripheral portion of the disk-shaped lower housing 12. Both are fixed by screws 116 to form a housing structure having a space inside. In the present embodiment, the upper housing 11 is formed by press working with metal. However, it may be formed using a resin material by molding.

[Upper housing]
In the upper housing 11, a side plate 112 is formed at a position surrounding the top plate 111 from the outer peripheral edge of the disk-shaped top plate 111 downward. A flange-shaped brim portion 112 a having a plurality of holes 112 b for joining to the lower housing 12 is formed at the lower end of the side plate 112. The top plate 111 and the side plate 112 may be integrally formed by metal pressing. Alternatively, the top plate 111 and the side plate 112 may be separately formed and then joined with an adhesive or the like.

  The top plate 111 of the upper housing 11 has three intake holes 111ax. The intake hole 111ax is disposed concentrically with a mounting hole 121bx for the light source unit 100 which is opened in a bottom plate 121 of the lower housing 12 described later. Therefore, when assembled as the lighting fixture 1, the air inlet 111ax and the central region 3x1a of the light source unit 100 are configured to have a positional relationship so as to overlap in plan view. As described above, the heat radiating fin 3x2 has a plurality of heat radiating plates standing radially in the surrounding region 3x1d of the upper surface 3x1a of the base 3x1, and the heat radiating plate extends to the inside of the top plate 111 of the housing 10. In the plan view direction, the heat radiating fins 3x2 are positioned so as to surround the intake holes 111ax. Therefore, the intake hole 111ax is opened so as to be positioned in the vicinity of the radiation fin 3x2.

A mounting member 113 is fixed to the top surface of the top plate 111 with screws 115. By fixing the mounting member 113 to the ceiling, which is a construction material, using the screws 114 from below, the lighting fixture 1 is mounted so as to emit light downward.
[Lower case]
In the lower housing 12, a surrounding wall 122 is formed at a position surrounding the bottom plate 121 from the outer peripheral edge of the disk-shaped bottom plate 121 downward. In the vicinity of the outer peripheral edge of the bottom plate 121, a plurality of screw holes 121c for screwing screws 116 for joining to the upper housing 11 are provided. The bottom plate 121 and the surrounding wall 122 may be integrally formed by metal pressing. Alternatively, the bottom plate 121 and the surrounding wall 122 may be separately formed and then joined with an adhesive or the like.

Three attachment holes 121bx for the light source unit 100 are formed in the bottom plate 121 of the lower housing 12. The mounting hole 121bx is disposed concentrically with the intake hole 111ax formed in the top plate 111 of the upper housing 11.
Three exhaust holes 121ax are formed in the bottom plate 121 of the lower housing 12. A plurality of screw holes for attaching the air cooling fan 40 are formed around each exhaust hole 121ax, and the air cooling fan 40 is attached to each exhaust hole 121ax with the blowing direction directed downward.

  FIG. 8 is a plan view of the lighting apparatus 1 with the upper housing removed. As shown in FIG. 8, each exhaust hole 121ax is opened in a region between the heat sinks 30 on the bottom plate 121 of the lower housing 12. In addition, each of the heat sinks 30 is disposed at a position where two exhaust holes 121ax are close to the outer periphery of the heat sink 30 when viewed from each heat sink 30.

That is, when the bottom plate 121 of the lower housing 12 is viewed in plan, each exhaust hole 121ax to which one air cooling fan 40 is attached is opened on the opposite side of the intake hole 111ax across the heat radiation fin 3x2 of each heat sink 30. Further, another exhaust hole 121ax to which another air cooling fan 40 is attached is opened on the opposite side of the intake hole 111ax with the heat radiation fin 3x2 interposed therebetween.
8, the bottom plate 121, the mounting hole 121bx, and the exhaust hole 121ax are circular, and the center of the exhaust hole 121ax is on the arc of an arbitrary first virtual circle B that is centered on the center of the bottom plate 121. It is in. On the other hand, the center of the mounting hole 121bx is on the arc of another arbitrary second virtual circle C that is also centered on the center of the bottom plate 121.

  In the present embodiment, the diameter of the first virtual circle B where the center of the small exhaust hole 121ax is disposed is larger than the diameter of the second virtual circle C where the center of the large mounting hole 121bx is disposed. It was. Thus, by arranging the mounting hole 121bx and the exhaust hole 121ax on virtual arcs of virtual circles having different sizes, both holes can be efficiently arranged in the bottom plate 121, and the housing 10 can be made compact. Can contribute.

When the size of the mounting hole 121bx is smaller than the size of the exhaust hole 121ax, the diameter of the second virtual circle C may be larger than the diameter B of the first virtual circle. When the size of the mounting hole 121bx and the size of the exhaust hole 121ax are the same, the diameter B of the first virtual circle and the diameter C of the second virtual circle may be the same.
[About the internal structure of the chassis]
As described above, the upper casing 11 and the lower casing 12 are joined at the outer peripheral edge to form a space 13 inside the casing 1. In this internal space, a plurality of intake holes 111ax and a plurality of exhaust holes 121ax are opened as openings to the outside.

  9 is a cross-sectional view of the luminaire 1 taken along a cross-section AA shown in FIGS. 2 and 3, where (a) is an overall cross-sectional view, and (b) is an enlarged cross-sectional view of a portion D in (a). It is. FIGS. 9A and 9B show cross sections passing through the respective circle centers in the planar view direction of the light source unit 101 and the air cooling fan 42, and D part is an enlarged cross-sectional view of a portion of the light source unit 101. In both figures, the mounting member 113 is not shown.

  As shown in FIG. 9A, the top plate 111 of the upper housing 11 is formed with an intake hole 111a1. The air intake hole 111 a 1 is disposed immediately above the mounting hole 121 b 1 for the light source unit 100 provided in the bottom plate 121 of the lower housing 12. The base 311 of the heat sink 31 of the light source unit 101 is fitted into the mounting hole 121b1. For this reason, the intake holes 111a1 and the central region 311c of the light source unit 101 are configured so as to overlap each other in plan view. The outer periphery of the peripheral wall 313 may be fitted to the inner periphery of the mounting hole 121b1.

Further, an exhaust hole 121ax is formed in the bottom plate 121 of the lower housing 12, and the air cooling fan 40 is attached with the blowing direction directed downward. The air cooling fan 40 exists in the position which overlaps with the exhaust hole 121ax in plan view.
(Circuit unit)
The circuit unit (not shown) is for lighting each light source unit 100 and driving each air cooling fan 40, and has a wiring 61 electrically connected to each light source unit 100 and each air cooling fan 40. . A connector 62 detachably connected to the connector 2x3a of the lead wire 2x3 from each light source unit 100 and the connector 4x1a of the lead wire 4x1 from each air cooling fan 40 is attached to the tip of the wiring 61.

  The circuit unit includes a power supply circuit that supplies a current input from an external commercial AC power supply (not shown) to the light emitting module 20 and the air cooling fan 40, and a circuit case in which the power supply circuit is accommodated. In the lighting fixture 1, the light source unit 100 and the circuit unit are separately unitized, and the circuit case is disposed in a ceiling surface or a mounting hole (not shown) provided in the ceiling surface.

The lighting fixture according to the present invention may have a configuration in which a circuit corresponding to a circuit unit is built in the light source unit 100.
<Flow of heat and air during lighting>
(All air cooling fans are operating normally)
The heat flow and air flow during lighting will be described.

  As described above, the suction hole 111ax of the top plate 111 of the upper housing 11 and the central region 3x1c of the light source unit 100 are configured to have a positional relationship such that they overlap in plan view. For this reason, the air that has entered the housing 10 from the air intake hole 111ax passes through the air passage 3x1e, contacts the back surface side of the light emitting module 20 attachment region in the base 3x1, and then is directed in the radial direction by the convex portion 3x1f. In other words, the gap between the heat dissipating plates constituting the heat dissipating fins 3x2 is radially discharged.

  The light source unit 101 will be described as an example. As shown in FIG. 9B, the air that has entered the housing 10 through the air intake hole 111 a 1 passes through the ventilation path 311 e and comes into contact with the back side of the arrangement region of the light emitting module 21 in the base 311 of the heat sink 31. The back side of the arrangement region of the light emitting module 21 is a portion of the heat sink 31 that is the highest temperature due to heat transfer from the light emitting module 21. Therefore, the heat generated by the light emitting module 21 can be effectively radiated by directly applying air introduced into the housing 10 from the intake hole 111a1 to this portion.

The air abutting on the back side of the arrangement area of the light emitting module 21 is then turned in the radial direction by the conical convex portion 311f on the base portion 311 of the heat sink 31, and a gap between the heat radiating plates constituting the heat radiating fin 312 is formed. Radiates out.
At this time, the gap between the heat dissipating plates constituting the heat dissipating fins 312 is formed to be equal to the base 311 in the vertical direction. For this reason, the air which flowed out radially from the center area | region 311c can pass smoothly, and heat exchange with air can be performed efficiently. Thereby, the heat generated by the light emitting module 21 can be effectively radiated.

  FIG. 10 is a perspective cross-sectional view of the luminaire 1 taken along the section AA shown in FIGS. 2 and 3. The flow of the air in the housing | casing 10 is shown. The air that has flowed radially from the central region 311c on the base 311 of the heat sink 31 through the gap between the heat sinks in the peripheral region 311d circulates in the space 13 in the housing 10. The plurality of air cooling fans 40 are forcibly exhausted outside the casing 10 through the exhaust holes 121ax of the bottom plate 121 of the lower casing 12 and directed downward.

At this time, the pressure in the space 13 inside the housing 10 is lower than the pressure outside the housing 10. This is because the direction in which the air cooling fan 40 is blown out of the housing 10 causes negative pressure in the space 13 inside the housing 10 due to resistance between each air intake hole 111ax and the air cooling fan 40.
FIG. 11 is a schematic diagram showing the flow of air in the housing 10 of the luminaire 1. It is a top view in the state where the upper housing | casing 11 was removed from the lighting fixture 1, Comprising: (a) is the state in which all the air cooling fans 40 are operating normally, (b) is the state in which some air cooling fans stopped. It is. The amount of air flow in the space 13 is indicated by the thickness of the arrow.

As shown in FIG. 11A, the air flowing out from the air intake holes 111a1 to the space 13 through the air passage 311e of the heat sink 31 and the heat radiating fins 312 is discharged from all the exhaust holes 121a1, 121a2, 121a3. At this time, the amount of air exhausted from each exhaust hole 121ax increases when the distance from the heat sink 31 is short.
In the heat sink 31, the exhaust holes 121a1 and 121a3 have a shorter distance from the heat sink 31 than the exhaust holes 121a2. Therefore, the pressure of the air flowing out from the intake hole 111a1 to the space 13 through the air passage 311e of the heat sink 31 and the heat radiation fin 312 is stronger in the vicinity of the exhaust holes 121a1 and 121a3 than in the vicinity of the exhaust holes 121a2. Therefore, the amount of air discharged from the exhaust holes 121a1 and 121a3 is larger than the amount of air discharged from the exhaust holes 121a2.

Similarly, in the air that has flowed out of the air holes 111a2 into the space 13 through the air passages 321e of the heat sink 32 and the radiating fins 322, the amount of air discharged from the exhaust holes 121a1 and 121a2 is the air discharged from the exhaust holes 121a3. More than the amount of.
Further, in the air that has flowed out of the air intake holes 111a3 into the space 13 through the air passages 331e of the heat sink 33 and the heat radiation fins 332, the amount of air discharged from the exhaust holes 121a2 and 121a3 is the amount of air discharged from the exhaust holes 121a1. More than the amount.

In this manner, the air introduced into the housing 10 from each intake hole 111ax is discharged out of the housing 10 from each exhaust hole 121ax. The amount of air discharged from each exhaust hole 121ax increases as the distance between each intake hole 111ax and each exhaust hole 121ax decreases.
(Some air cooling fans stop operating)
FIG. 11B shows a state in which the operation of the air cooling fan 41 is stopped due to, for example, a failure. Since the operation of the air cooling fan 41 is stopped, the air cannot be discharged from the exhaust hole 121a1 to the outside of the housing 10 by the operation of the air cooling fan 41. Therefore, the air introduced into the housing 10 from the air holes 111ax is mainly discharged from the exhaust holes 121a2 and 121a3.

  For example, as shown in FIG. 11 (b), the air that has flowed out from the intake hole 111a1 into the space 13 through the air passage 311e of the heat sink 31 and the heat radiating fin 312 is discharged from the exhaust holes 121a2 and 121a3. At this time, since the exhaust hole 121a3 has a shorter distance from the heat sink 31 than the exhaust hole 121a2, the flow pressure is strong, and the amount of air discharged from the exhaust hole 121a3 is the amount of air discharged from the exhaust hole 121a2. More than the amount.

Similarly, in the air that has flowed out of the air holes 111a2 into the space 13 through the air passages 321e of the heat sink 32 and the heat radiation fins 322, the amount of air discharged from the exhaust holes 121a2 is the amount of air discharged from the exhaust holes 121a3. More than.
Further, the amount of air discharged from the exhaust holes 121a2 and 121a3 is equivalent for the air that has flowed out from the intake holes 111a3 to the space 13 through the air passages 331e of the heat sink 33 and the heat radiation fins 332.

As described above, the air introduced into the housing 10 from each intake hole 111ax is discharged out of the housing 10 through the exhaust holes in the vicinity of two normally operating air cooling fans. The shorter the distance between each intake hole 111ax and each exhaust hole 121ax, the smaller the resistance from each intake hole 111ax to each exhaust hole 121ax, and the greater the amount of air discharged from each exhaust hole 121ax.
The flow rates of the air cooling fans 42 and 43 are equivalent to the state of FIG. 9A in which all the air cooling fans 40 are operating normally. Accordingly, the total amount of air that can be discharged out of the housing 10 is reduced to 2/3 compared to the state of FIG. 9A, and the heat dissipation amount of each heat sink 30 is reduced. The temperature rises. However, in the present embodiment, it is possible to prevent any one of the light source units 100 from being abnormally heated due to the operation of some of the air-cooling fans 40 being in trouble and causing a failure as the lighting fixture 1. it can.

  As a comparative example of the present embodiment, assume a configuration in which each light source unit is provided with an intake hole, an exhaust hole, and an air cooling fan, and the intake hole and the exhaust hole between the light source units are not communicated with each other. For example, the present embodiment is taken as an example, and a configuration is assumed in which the space 13 is further provided with a partition wall that divides the space 13 inside the housing 10 into each light source unit 100 and each exhaust hole 121ax opened around the light source unit 100. In this case, when the operation of some of the air cooling fans is stopped due to a failure, the light source unit 100 existing in the same partition in the space 13 with the intake hole 121ax to which the failed air cooling fan 40 is attached is cooled. Can hardly supply the air to do. Therefore, the light source unit 100 may be abnormally heated to cause a failure, resulting in a failure as the lighting fixture 1. That is, a failure of some of the air cooling fans is directly connected to a failure as a lighting fixture. In this case, since the failure rate of the lighting fixture is the sum of the failure rates of the fans, it is necessary to keep the failure rate of the air cooling fans low in order to keep the failure rate of the lighting fixture low. If even one air cooling fan fails, the cooling performance of a specific light source is remarkably lowered, and the failure rate of the lighting fixture itself tends to increase. Therefore, in order to reduce the failure rate of the lighting fixture, Therefore, it was necessary to further improve the reliability required for this. For example, in order to set the failure rate of a lighting fixture to 1% or less, it is necessary to set the failure rate of each fan to 1/3% or less.

  On the other hand, in the lighting fixture 1 of the present embodiment, so-called redundant operation is possible in which failure of the lighting fixture does not occur even if some of the air cooling fans fail. In the present embodiment, the luminaire 1 continues to operate normally even if one air cooling fan 40 fails. Although the temperature of each light source unit 100 rises, the operation can be continued normally. Then, when the second air cooling fan 40 fails, it is determined that the lighting fixture 1 has failed, and the operation is stopped, or the light emission luminance of the light source unit is reduced. In this case, the failure rate of the lighting fixture is not the sum of the failure rates of the fans. For example, when the failure rate of each fan is 1% or less, the failure rate of the lighting fixture is 0.3% or less. The failure rate of the instrument can be reduced.

<Effect>
As described above, in this embodiment, in the lighting apparatus 1 having the heat dissipation structure in which the light source unit 100 having the light emitting element 2x2a is cooled by the plurality of air cooling fans 40, even if some of the air cooling fans 40 break down, the apparatus Redundant operation with no hindrance to the overall operation can be realized. Therefore, the reliability of the lighting fixture 1 can be improved.

<Modification 1>
In the embodiment, the heat sink 30 of the light source unit 100 has a cover portion 3x3 that is provided on the outer periphery of the lower surface 3x1b of the base portion 3x1 and extends downward from the base portion 3x1, and the cover portion 3x3 emits light emitted from the light emitting module 20 downward. It was set as the structure which plays the role which reflects toward. However, the function of the cover portion 3x3 is not limited to the function as the reflecting member, and the configuration thereof may be changed as appropriate. For example, the cover 3x3 may be configured to function as a heat radiating member by arranging the cover 3x3 at a position where exhaust from the inside of the housing 10 directly hits.

12A and 12B are partial side cross-sectional views of the lighting apparatus according to the first modification, in which FIG. 12A is a side cross-sectional view in the vicinity of the air cooling fan 40, and FIG.
FIG. 12A shows an example in which the cover portion 3x3 is arranged at a position where exhaust from the air-cooling fan 42 directly hits and functions as a heat radiating member of the light source unit 101. This can be realized by arranging the outer edge of the cover portion 3x3 so as to extend to the immediate vicinity or below the air cooling fan 42. Or you may take the structure which adjusts the wind direction of exhaust_gas | exhaustion so that the exhaust_gas | exhaustion from the air cooling fan 42 may hit the cover part 3x3.

  FIG. 21B shows a flow path through which air that enters the inside of the housing 10 through the intake hole 111ax and flows out radially through the gaps between the heat dissipating plates constituting the heat dissipating fins 3x2 flows downward on the outer periphery of the cover portion 3x3. This is a configured example. For example, by providing an opening in the vicinity of the outer peripheral edge of the cover portion 3x3 in the bottom plate 121 of the lower housing 12, the air that radially flows out on the upper surface 311a of the base portion 311 can flow downward.

Thereby, the cover part 3x3 can be made to function as a heat radiating member, the heat dissipation of the heat sink 30 can be improved, the temperature of the air cooling fan 40 can be lowered, and the reliability of the lighting fixture can be improved.
<Modification 2>
In the embodiment, each of the heat sinks 30 has a configuration in which a mounting hole opened in the bottom plate 121 of the lower housing 12 is inserted into 121bx and is thermally independent. However, it is not limited to this and may be changed as appropriate. For example, the heat sinks 30 may be connected by a high heat conductive member such as a heat pipe so that the heat sinks 30 are thermally coupled.

  FIGS. 13A and 13B are plan views of a lighting fixture according to the second modified example, in which FIG. 13A shows a state in which the upper housing 11 is removed, and FIG. 13B shows a state in which the operation of the air cooling fan 41 is stopped due to a failure. As shown in FIG. 13, in Modification 2, the heat sinks 31 and 32 are connected by a heat pipe 51, the heat sinks 32 and 33 are connected by a heat pipe 52, and the heat sinks 31 and 33 are connected by a heat pipe 53. . The heat pipes 51, 52, 53 (hereinafter referred to as the heat pipe 50 when it is not necessary to distinguish) are arranged so that the heat radiating plate and the heat pipe 50 come into contact with the gap between the heat radiating plates of the heat radiating fins 3 × 2 of each heat sink 30. Embedded in. The heat radiating fins 3x2 form a heat conduction path from the light emitting module 20. Since the heat pipe 50 is in contact with the path, the heat generated in the light emitting module 20 can be efficiently conducted to the heat pipe 50. Since the heat pipe 50 exists from the upper end to the lower end of the heat sink, heat can be efficiently conducted to the heat sink 50. In addition, the structure which conducts heat efficiently with heat-transfer bodies other than the heat pipe 50 may be sufficient.

  FIG. 12B shows a state where the operation of the air cooling fan 41 is stopped due to a failure. Since the operation of the air cooling fan 41 is stopped, the air cooling fan 41 cannot exhaust air from the exhaust hole 121a1 to the outside of the housing 10. The air introduced into the housing 10 from each intake hole 111ax is discharged out of the housing 10 through the exhaust holes near the two air cooling fans that are operating normally.

  Specifically, as shown in FIG. 12B, the air that has flowed out of the air intake holes 111a1 into the space 13 through the air passage 311e of the heat sink 31 and the heat radiating fins 312 is discharged from the exhaust holes 121a2 and 121a3. At this time, since the exhaust hole 121a3 has a shorter distance from the heat sink 31 than the exhaust hole 121a2, the amount of air discharged from the exhaust hole 121a3 is larger than the amount of air discharged from the exhaust hole 121a2. Similarly, in the air that has flowed out of the air holes 111a2 into the space 13 through the air passages 321e of the heat sink 32 and the heat radiation fins 322, the amount of air discharged from the exhaust holes 121a2 is the amount of air discharged from the exhaust holes 121a3. More than. Further, the amount of air discharged from the exhaust holes 121a2 and 121a3 is equivalent for the air that has flowed out from the intake holes 111a3 to the space 13 through the air passages 331e of the heat sink 33 and the heat radiation fins 332.

  As described above, the heat sinks 31 and 32 have a smaller number of available exhaust holes adjacent to each heat sink than the heat sink 33. Therefore, since the total distance to the available exhaust holes close to the heat sink becomes longer, the amount of air discharged from the heat sinks 31 and 32 becomes smaller than the amount of air discharged from the heat sink 33. Therefore, immediately after the operation of the air cooling fan 41 is stopped due to a failure, the temperature of the heat sinks 31 and 32 becomes higher than the temperature of the heat sink 33 (the left diagram in FIG. 12B).

However, by thermally connecting the heat sinks 30 with the heat pipes 50, heat can be transported from the heat sinks 31 and 32 having the increased temperature to the heat sink 33 having the lower temperature. Thereby, the temperature deviation between the heat sinks 30 can be reduced (the right diagram in FIG. 12B).
As a result, the lifetime of the light emitting element 2x2a between the light source units 100 and the variation in light flux between the light source units 100 can be reduced. Heating of the light source unit can be prevented and the reliability of the lighting fixture can be improved.

<Modification 3>
In the embodiment, the air cooling fan 40 is attached to the exhaust hole 121ax opened in the bottom plate 121 of the lower housing 12 with the blowing direction facing downward, and the air in the housing 10 is directed downward. It was set as the structure exhausted out of the housing | casing 10. FIG. However, the exhaust hole 121ax is not limited to this and can be changed. For example, you may comprise the cover member which opens and closes in response to operation | movement of the air cooling fan 40. FIG. In other words, each exhaust hole 121ax is provided with a lid that opens when the air-cooling fan 40 attached is open and closes when the air-cooling fan 40 is stopped.

  14A and 14B are schematic views of an air-cooling fan of a lighting fixture according to Modification 3. FIG. 14A shows a state where the lid is closed, and FIG. 14B shows a state where the lid is open. Hinges 412, 422, and 432 are provided in the vicinity of the exhaust holes 121 ax formed in the bottom plate 121 of the lower housing 12, and lid members 411, 421, and 431 that are opened during operation and closed during operation in conjunction with the operation of the air cooling fan 40. Is attached. For example, in the opening / closing operation, a spring or the like is provided on the hinges 412, 422, 432, and the lid members 411, 421, 431 receiving wind are passively rotated around the hinges 412, 422, 432. Good. By providing such lid members 411, 421, 431, it is possible to prevent the exhaust gas heated inside the housing 10 from flowing backward when the air-cooling fan 40 stops operating. Thereby, the temperature rise in the housing | casing 10 can be prevented and the reliability of a lighting fixture can be improved.

<Modification 4>
In the above embodiment, the luminaire 1 is an example in which the exhaust plate 121ax is formed in the bottom plate 121 of the lower housing 12, and the air cooling fan 40 is arranged at a position overlapping the exhaust hole 121ax in plan view. It was shown to. However, the arrangement of the air cooling fans 40 may be changed as long as it is an arrangement that allows redundant operation that does not hinder the operation of the entire apparatus even if some of the air cooling fans break down.

  In Modification 4, for example, in the lighting fixture 1 according to the embodiment, an air cooling fan (blow-out type) for discharging air out of the housing 10 is provided in the ventilation path 3x1e in each light source unit 100. Each of the intake holes 111ax may be configured to function as an exhaust opening. Furthermore, in the modification 4, each exhaust hole 121ax in the lighting fixture 1 is not provided with an air cooling fan, but each exhaust hole 121ax is made to function as an intake opening.

  In this case, when the operation of some of the air cooling fans 40 is stopped due to a failure, in the light source unit where the failed air cooling fan exists, the air cannot be discharged from the exhaust opening by the air cooling fan. However, the air in the space 13 inside the housing 10 is outside the housing 10 from the exhaust opening in the vicinity of another air cooling fan 40 (which exists in the ventilation path 3x1e of the other light source unit 40) operating normally. Is discharged. At that time, as described above, the pressure in the space 13 inside the housing 10 is lower than the pressure outside the housing 10. For this reason, in the light source unit in which the failed air cooling fan exists, air flows in reversely from the exhaust opening. The inflowing air radially flows out through the gaps between the heat dissipating plates constituting the heat dissipating fins 3x2 arranged so as to surround the air passage 3x1e in the light source unit 100 in plan view. At that time, the heat generation of the light emitting module 21 is effectively radiated from the radiation fins 3x2 in the light source unit 100 whose operation is stopped due to the failure of the air cooling fan 40. The air that has flowed out of the light source unit 100 whose operation has been stopped due to a failure of the air cooling fan 40 then enters the air passage 3x1e of the other light source unit 40, and the air cooling fan 40 that is operating normally is in the vicinity. It is discharged out of the housing 10 through the exhaust opening.

Thereby, in the modification 4, even if some air-cooling fans 40 break down, the redundant operation which does not hinder the operation | movement of the whole fixture can be implement | achieved, and the reliability of the lighting fixture 1 can be improved.
<Other variations>
In addition, although it demonstrated based on said embodiment, of course, this invention is not limited to said embodiment. The following cases are also included in the present invention. In addition, when the same member as the member already demonstrated is used, the code | symbol same as the member is attached | subjected and description is simplified or abbreviate | omitted.

  (1) In the embodiment described above, the air inlet holes 111ax are formed in the top plate 111 of the upper casing 11 at three locations, and the air inlet holes 111ax are opened in the bottom plate 121 of the lower casing 12. The case where it has been arrange | positioned concentrically with the mounting hole 121bx for this was shown. However, the position and number of the intake holes 111ax and the positional relationship with the mounting holes 121bx are not necessarily limited to this case, and may be provided in a portion other than the top casing 11 of the casing 10 in the casing 10. The intake hole 111ax is provided in the vicinity of the heat radiating fin of the heat sink and may be located at the position where the exhaust hole 121ax is provided on the opposite side of the intake hole 111ax sandwiching the radiating fin. For example, the side plate 112 of the upper housing 11 is provided. The upper or lower housing 12 may be provided. Moreover, the number should just be 1 or more, and 2 or 4 or more may be sufficient as it.

  (2) In the above-described embodiment, the case where the exhaust holes 121ax are formed in three places on the bottom plate 121 of the lower housing 12 is shown. However, the position and number of the exhaust holes 121ax and the positional relationship with the mounting holes 121bx are not necessarily limited to this case, and may be provided in a portion other than the bottom plate 121 of the lower housing 12 in the housing 10. The exhaust hole 121ax may be provided at a position opposite to the intake hole 111ax with the heat radiation fin interposed therebetween. For example, the exhaust hole 121ax may be provided on the side plate 112 of the upper housing 11 or the top plate 111 of the upper housing 11 or the like. Also good. Moreover, the number should just be 2 or more, and 4 or 5 or more may be sufficient as it.

  (3) In the above embodiment, the heat radiating fins 3x2 have a plurality of heat radiating plates standing radially in the surrounding area 3x1d that surrounds the central area 3x1c in a donut shape in the upper surface 3x1a of the base 3x1 of the heat sink 30. The case where it is formed is shown. However, the position, shape, and number of the radiating fins 3x2, and the positional relationship with the intake holes 111ax and the exhaust holes 121ax are not necessarily limited to this case, and other configurations may be used. The radiating fin 3x2 may be provided in the vicinity of the intake hole 111ax and at a position where the exhaust hole 121ax is provided on the opposite side of the intake hole 111ax across the radiating fin. For example, a plurality of radiating fins 3x2 may be provided on the entire upper surface 3x1a of the base 3x1. A plurality of heat sinks may be erected in a radial or linear manner.

  (4) In the above embodiment, the luminaire 1 shows a case where the housing 10 includes the three light source units 101, 102, 103 and the three air cooling fans 41, 42, 43. . However, the numbers of the light source units and the air cooling fans are not necessarily limited to this case, and may have other configurations. The number of the light source units and the air cooling fans may be changed as appropriate as long as it is a configuration capable of realizing a redundant operation that does not hinder the operation of the entire apparatus even if some of the air cooling fans break down. For example, the number of light source units may be one or more, and may be two or four or more. Moreover, the number of air cooling fans should just be 2 or more, and may be 4 or 5 or more.

  (5) In the above embodiment, the casing 10 is composed of the upper casing 11 and the lower casing 12, and the outer peripheral end of the disc-shaped upper casing 11 is formed on the outer peripheral portion of the disc-shaped lower casing 12. Is shown, and both are fixed by screws 116. However, the configuration of the housing is not necessarily limited to the above-described configuration, and any configuration that can form a housing structure having a space inside may be used, and the shape, structure, material, manufacturing method, dimensions, and the like can be changed as appropriate. is there. For example, the outer shape may be a box having a rectangular planar shape. Further, it may be formed by any manufacturing method such as metal press, resin molding or the like.

(6) A temperature detection element may be provided at a position close to the heat sink. When the temperature is higher than a predetermined temperature, the lighting operation can be restricted or stopped to increase the safety of the lighting apparatus.
(7) In the above embodiment, the case where the air cooling fan 40 is a so-called axial flow type fan has been described, but the present invention is not necessarily limited to this case. The air cooling fan only needs to be able to generate an air flow, and may be a so-called centrifugal fan, for example.

  (8) In the above embodiment, the light emitting module in which the LED element is mounted face-up using the COB technology is adopted as the light source. However, the present invention is not necessarily limited to this case. The light emitting module is not limited to the one mounted face-up using the COB technology, and, for example, an SMD (Surface Mount Device) type may be mounted on the substrate. For example, a configuration in which a plurality of SMD light sources are arranged in a matrix on the upper surface of a circular plate-like substrate may be employed. Further, as the light source, an inorganic EL element, an organic EL element, an LD (Laser Diode), a light emitting transistor (Light Emitting Transistor), or the like may be employed.

(9) In the above embodiment, the light emitting module is incorporated in the lighting fixture as a part of the lighting device in the above embodiment, but the light emitting module is not a part of the lighting device, but as a single unit. You may integrate directly in a lighting fixture, without passing through an illuminating device.
(10) The above-described embodiment and modifications may be partially combined.
(Other)
As mentioned above, although the structure of this invention was demonstrated based on the said embodiment and modification, this invention is not restricted to the said embodiment and its modification. For example, the structure which combined suitably the said embodiment and the partial structure of the modification may be sufficient. In addition, the materials, numerical values, and the like described in the above embodiments are merely preferable examples and are not limited thereto. Furthermore, it is possible to appropriately change the configuration without departing from the scope of the technical idea of the present invention. The present invention can be widely used in general lighting applications.

≪Summary≫
The lighting fixture according to the present embodiment protrudes from the base 10, the first air cooling fan 41 and the second air cooling fan 43, the base 311 joined to the case 10, and the base to the inside of the case 10. The heat sink 31 having the radiation fins 312 and the light emitting module 21 having the light emitting element 212a that is thermally coupled to the base 311 of the heat sink 31 and emits light toward the outside of the housing 10 are provided. A first opening 111a1 is opened in the vicinity of the radiation fin 312, and a second opening 121a1 and a third opening 121a3 are respectively opened on the opposite side of the first opening 111a1 across the radiation fin 312. And the second air cooling fan 43 has a blowing direction in two openings selected from the first opening 111a1, the second opening 121a1, and the third opening 121a3. It is characterized by being attached 10 outward.

  In another aspect, the housing 10 has a first opening 111a1 in the vicinity of the heat radiating fin 312 of the heat sink 31 and a first air cooling fan on the opposite side of the first opening 111a1 across the heat radiating fin 312. A second opening 121a1 to which 41 is attached and a third opening 121a3 to which the second air cooling fan 43 is attached are respectively opened. The first air cooling fan 41 and the second air cooling fan 43 have the blowing direction in the housing. The configuration may be directed toward the outside of the body.

  In another aspect, the base 321 joined to the housing 10, the second heat sink 32 having the second heat radiation fin 322 protruding from the base 321 into the housing 10, and the base of the second heat sink 32 A second light-emitting module 22 having a second light-emitting element 222a that is thermally coupled to 321 and emits light toward the outside of the housing 10, and the housing 10 has a second heat sink 32 near the second heat radiation fin 322. In addition, a fifth opening 111a2 may be provided on the opposite side of the second opening 121a1 and the third opening 121a3 with the second heat radiation fin 322 interposed therebetween.

With such a configuration, it is possible to realize a redundant operation that does not hinder the operation of the entire apparatus even if some of the air cooling fans 41 or 43 break down. Therefore, the reliability of the lighting fixture 1 can be improved.
Moreover, in another aspect, the lighting fixture protruded in the housing | casing 10 from the housing | casing 10, the 1st air cooling fan 41 and the 2nd air cooling fan 42, the base 321 joined to the housing | casing 10, and the said base. The heat sink 32 having the radiation fins 322 and the light emitting module 22 having the light emitting element 222a that is thermally coupled to the base 321 of the heat sink 32 and emits light toward the outside of the housing 10 are provided. A first opening 111a2 is opened in the vicinity of the heat radiating fin 322, and a second opening 121a1 to which the first air cooling fan 41 is attached and a second air cooling fan 42 are arranged on the opposite side of the first opening 111a2 across the heat radiating fin 322. The third opening 121a2 to which is attached is opened, and the first air cooling fan 41 and the second air cooling fan 42 have their blowing directions directed outward from the casing. And features.

  In another aspect, the base 331 joined to the housing 10, the second heat sink 33 having the second heat radiation fin 332 projecting from the base 331 into the housing 10, and the base of the second heat sink 33 A second light-emitting module 23 having a second light-emitting element 232a that is thermally coupled to 331 and emits light toward the outside of the housing 10, and the housing 10 has a second heat sink 33 near the second heat radiation fin 332. In addition, a fifth opening 111a3 may be provided on the opposite side of the second opening 121a1 and the third opening 121a2 with the second heat radiation fin 332 interposed therebetween.

With such a configuration, it is possible to realize a redundant operation that does not hinder the operation of the entire apparatus even if some of the air cooling fans 41 or 42 break down. Therefore, the reliability of the lighting fixture 1 can be improved.
Moreover, in another aspect, the lighting fixture protruded in the housing | casing 10 from the housing | casing 10, the 1st air cooling fan 42 and the 2nd air cooling fan 43, the base 331 joined to the housing | casing 10, and the said base. The heat sink 33 having the radiation fins 332 and the light emitting module 23 having the light emitting element 232a that is thermally coupled to the base 331 of the heat sink 33 and emits light toward the outside of the housing 10 are provided. A first opening 111a3 is opened in the vicinity of the heat radiating fin 332, and on the opposite side of the first opening 111a3 across the heat radiating fin 332, a second opening 121a2 to which a first air cooling fan 42 is attached and a second air cooling fan 43 are provided. The third opening 121a3 to which is attached is opened, and the first air cooling fan 42 and the second air cooling fan 43 have the blowing direction directed to the outside of the housing. And features.

  In another aspect, the base 311 further includes a base 311 joined to the housing 10, a second heat radiation fin 312 protruding from the base 311 into the housing 10, and a base of the second heat sink 31. 311 and a second light emitting module 21 having a second light emitting element 212 a that emits light toward the outside of the housing 10. The housing 10 has a second heat sink 31 near the second heat radiation fin 312. In addition, a fifth opening 111a1 may be provided on the opposite side of the second opening 121a2 and the third opening 121a3 with the second heat radiation fin 312 interposed therebetween.

  With such a configuration, it is possible to realize a redundant operation that does not hinder the operation of the entire apparatus even if some of the air cooling fans 42 or 43 break down. Therefore, the reliability of the lighting fixture 1 can be improved.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 10 Housing | casing 11 Upper housing | casing 111 Top plate 111ax (111a1, 111a2, 111a3) Air intake hole (1st opening or 5th opening)
112 Side plate 113 Fixing member 12 Lower housing 121 Bottom plate 121ax (121a1, 121a2, 121a3) Exhaust hole (second opening or third opening)
121bx (121b1, 121b2, 121b3) Mounting hole (fourth or sixth opening)
122 Enclosure 20 (21, 22, 23) Light emitting module 2x1 (211, 221, 231) Substrate 2x2 (212, 222, 232) Light emitting part 2x2a (212a, 222a, 232a) Light emitting element 2x2b (212b, 222b, 232b) Sealing Stop member 30 (31, 32, 33) Heat sink 3x1 (311, 321, 331) Base 3x2 (312, 322, 332) Radiation fin 3x3 (313, 323, 333) Cover 40 (41, 42, 43) Air cooling fan 100 (101, 102, 103) Light source unit (lighting device)

Claims (7)

A housing,
A first air cooling fan and a second air cooling fan;
A heat sink having a base joined to the housing and a heat radiation fin projecting from the base into the housing;
A light emitting module having a light emitting element thermally coupled to the base of the heat sink and emitting light toward the outside of the housing;
With
Wherein the housing, the is first opening opened to the heat radiation fins near the sink, on the opposite side of the first opening across the heat radiating fins are opened and the second opening and the third opening, respectively,
Said first air cooling fan and the second cooling fan, the first opening, the two openings being selected from the second opening and the third opening, are respectively attached to the blowing direction toward the outside of the housing side and,
The first air cooling fan is attached to the second opening ;
The second air cooling fan is attached to the third opening;
When the first air cooling fan stops operating, the air that has entered the housing from the first opening is exhausted from the third opening to the outside of the housing by the second air cooling fan,
When the operation of the second air cooling fan is stopped, the air that has entered the housing from the first opening is discharged from the second opening to the outside of the housing by the first air cooling fan. /> Lighting equipment. A housing,
A first air cooling fan and a second air cooling fan;
A heat sink having a base joined to the housing and a heat radiation fin projecting from the base into the housing;
A light emitting module having a light emitting element thermally coupled to the base of the heat sink and emitting light toward the outside of the housing;
With
The housing has a first opening in the vicinity of the heat sink fin of the heat sink, and a second opening and a third opening on the opposite side of the first opening sandwiching the heat sink fin, respectively.
The first air cooling fan and the second air cooling fan are respectively attached to two openings selected from the first opening, the second opening, and the third opening with the blowing direction toward the outside of the housing. And
The first air cooling fan is attached to the second opening ;
The second air cooling fan is attached to the third opening;
The housing has a top plate, a bottom plate, a side plate,
The first opening is opened in the top plate,
The bottom plate is provided with a fourth opening at a position overlapping the first opening in plan view,
Wherein the fourth opening, the base of the front Kihi heatsink is inserted,
The light emitting module is present in the fourth opening on the lower surface of the base of the heat sink with the light emitting element facing downward.
The lighting fixture which the air which approached into the said housing | casing from the said 1st opening hits the area | region located above the said light emitting module of the base part of the said heat sink. The said heat radiating fin is a lighting fixture of Claim 2 which exists in the area | region which surrounds said 1st opening in planar view. Before Kihi sink so as to surround the front Symbol onset optical module includes a cover portion which is circumferentially downward from the base portion,
Exhaust gas discharged to the outside of the housing through the second opening by the first air cooling fan, or exhaust gas discharged to the outside of the housing through the third opening by the second air cooling fan. or the lighting device according to claim 2 or 3 corresponds to the cover. A housing,
A first air cooling fan and a second air cooling fan;
A heat sink having a base joined to the housing and a heat radiation fin projecting from the base into the housing;
A light emitting module having a light emitting element thermally coupled to the base of the heat sink and emitting light toward the outside of the housing;
With
The housing has a first opening in the vicinity of the heat sink fin of the heat sink, and a second opening and a third opening on the opposite side of the first opening sandwiching the heat sink fin, respectively.
The first air cooling fan and the second air cooling fan are respectively attached to two openings selected from the first opening, the second opening, and the third opening with the blowing direction toward the outside of the housing. And
The first air cooling fan is attached to the second opening ;
The second air cooling fan is attached to the third opening;
When the heat sink is a first heat sink, the heat dissipating fin is a first heat dissipating fin, the light emitting element is a first light emitting element, and the light emitting module is a first light emitting module,
And a second heat sink having a base joined to the housing and a second radiation fin projecting from the base into the housing;
A second light emitting module having a second light emitting element that is thermally coupled to a base of the second heat sink and emits light toward the outside of the housing;
With
Wherein the housing, a second heat radiation fin vicinity of the second heat sink, wherein on the opposite side of the second sandwiching radiation fins second opening and the third opening fifth opening being opened lighting equipment. When the first air cooling fan stops operating, the air that has entered the housing through the fifth opening is exhausted from the third opening to the outside of the housing by the second air cooling fan,
When the second cooling fan is stopped, air that has entered the inside of the housing from the fifth opening in claim 5 which is discharged by the first cooling fan from the second opening to the outside of the housing The luminaire described. The housing has a top plate, a bottom plate, a side plate,
The first opening and the fifth opening resides in a said top plate,
The bottom plate is provided with a fourth opening at a position overlapping the first opening in plan view, and a sixth opening is set at a position overlapping with the fifth opening in plan view,
The base of the first heat sink is inserted into the fourth opening, and the base of the second heat sink is inserted into the sixth opening.
The first light emitting module is present in the fourth opening on the lower surface of the base of the first heat sink with the first light emitting element facing downward, and the air that has entered the housing from the first opening Is a region located above the first light emitting module at the base of the first heat sink,
The second light emitting module is present in the sixth opening on the bottom surface of the base of the second heat sink with the second light emitting element facing downward, and the air that has entered the housing from the fifth opening. The lighting fixture according to claim 5 , which corresponds to a region located above the second light emitting module at the base of the second heat sink.

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