JP6813307B2 - Floodlight - Google Patents

Description

The present technology relates to, for example, a floodlighting device used in a lighting tower, and more particularly to a cooling mechanism of the floodlighting device.

Conventionally, discharge lamps such as metal halide lamps have been widely used as a light source for floodlights, but in recent years, light emitting diodes (LEDs) have been used as a light source for the purpose of reducing the power consumption and extending the life of the light source. The floodlight used for the above is under development.

On the other hand, LEDs generate a relatively large amount of heat, and efficient heat exhaust is indispensable from the viewpoint of ensuring stable light emission operation. Therefore, a technique of installing a radiator having a plurality of heat radiation fins on the back side of the LED light source unit is common (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2015-144041

However, in the floodlighting device described in Patent Document 1, since a plurality of heat radiation fins are provided perpendicular to the back surface of the LED light source unit, the light source side and the opposite side are in the plane of each heat radiation fin. A large temperature distribution is likely to occur. As a result, there is a problem that the area of each heat radiating fin cannot be effectively utilized and the heat radiating effect cannot be enhanced.

In addition, depending on the mounting posture or the direction of the floodlight, the air between the heat radiation fins tends to stay, and as a result, the heat exchange efficiency with the outside air decreases, and a stable heat dissipation effect can be ensured. It may not be possible.

In view of the above circumstances, an object of the present technology is to provide a floodlighting device capable of obtaining a good heat dissipation effect regardless of the mounting posture.

The floodlighting device according to one embodiment of the present technology includes a main body unit, a plurality of heat pipes, and a plurality of heat radiation fins.
The main body unit has a plurality of light emitting elements that emit light in the first axial direction, and a support plate that supports the plurality of light emitting elements.
The plurality of heat pipes are thermally connected to the support plate and transport heat from the support plate in the first axial direction.
The plurality of heat radiation fins each have a hole portion penetrating in the first axial direction and a plurality of insertion portions arranged around the hole portion and inserted by the plurality of heat pipes. The plurality of heat radiation fins are arranged in parallel with the support plate, and are arranged at intervals in the first axial direction.

In the floodlighting device, since each of the plurality of heat radiation fins is arranged parallel to the support plate, the temperature distribution in the plane of each heat radiation fin can be suppressed to be small. As a result, the area of each heat radiating fin can be effectively utilized, so that the heat radiating effect can be enhanced.
Further, since each heat radiation fin has a hole portion penetrating in the first axial direction, outside air can flow through not only the space between the plurality of heat radiation fins but also the hole portion of each heat radiation fin. It will be possible. As a result, a good heat dissipation effect can be obtained regardless of the mounting posture and the projection direction.

The holes may face each other in the first axial direction in the plurality of heat radiation fins.
As a result, the circulation of outside air along the first axial direction between the plurality of heat radiating fins is promoted, so that the heat radiating effect can be further improved.

The plurality of insertion portions may be arranged in multiple rows with the hole portions interposed therebetween.
As a result, the symmetry between each insertion portion and the hole portion is enhanced, and the occurrence of temperature distribution in the plane can be suppressed.

The hole may be composed of a rectangular opening extending along the arrangement direction of the plurality of insertion portions.
As a result, the distance between each insertion portion and the hole portion can be made uniform, and the occurrence of in-plane temperature distribution can be further suppressed.

Each of the plurality of heat pipes has a heat receiving portion connected to the support plate, a heat transporting portion inserted into each of the plurality of insertion portions, and a bent portion connecting the heat receiving portion and the heat transporting portion. You may have.
As a result, heat can be efficiently transferred from the support plate to each heat radiation fin.

The plurality of heat pipes include a plurality of first heat pipes in which the heat receiving portion extends from the bent portion in parallel with the second axial direction orthogonal to the first axial direction, and the heat receiving portion extends from the bent portion. A plurality of second heat pipes parallel to the second axial direction and extending in a direction opposite to the heat receiving portion of the plurality of first heat pipes may be included. The plurality of first and second heat pipes are alternately juxtaposed with respect to the support plate in a third axial direction orthogonal to the first and second axial directions.
According to this configuration, the heat receiving portions can be densely arranged with respect to the support plate, and the insertion portions can be arranged at appropriate intervals in each heat radiation fin.

As described above, according to the present technology, a good heat dissipation effect can be obtained regardless of the mounting posture.

It is an exploded perspective view of the floodlight lighting apparatus which concerns on embodiment of this invention. It is a perspective view which looked at the said floodlighting apparatus diagonally from the front. It is a perspective view which looked at the floodlight lighting apparatus from the oblique rear. It is a perspective view which removed the guard member from FIG. It is a perspective view which removed the guard member from FIG. It is a rear view of a part of the floodlight lighting apparatus. It is a top view of a part of the floodlight lighting apparatus. It is a side view of a part of the floodlight lighting apparatus. It is sectional drawing of a part of the said floodlight lighting apparatus. It is a perspective view of a part of the heat dissipation unit of the floodlight lighting apparatus. It is a rear view of one of the heat radiation fins of FIG. It is a top view of the heat pipe of FIG. It is sectional drawing of the said floodlight lighting apparatus. It is a simulation result which shows an example of the temperature distribution of the main part of the floodlight lighting apparatus. It is the schematic sectional drawing of the floodlight lighting apparatus which concerns on a comparative example. It is a simulation result which shows an example of the temperature distribution of the main part of the floodlight lighting apparatus shown in FIG.

Hereinafter, embodiments relating to the present technology will be described with reference to the drawings.

1 to 5 show the entire floodlighting device according to the embodiment of the present invention, FIG. 1 is an exploded perspective view, FIG. 2 is a perspective view seen from the front (front), and FIG. 3 is a rear view. It is a perspective view seen from (rear). FIG. 4 is a perspective view showing a state in which the guard member is removed from FIG. 2, and FIG. 5 is a perspective view showing a state in which the guard member is removed from FIG. In each figure, the X-axis, Y-axis, and Z-axis show three axes orthogonal to each other, the X-axis corresponds to the height direction, the Y-axis corresponds to the lateral direction, and the Z-axis corresponds to the front-back direction (light projection direction). To do.

[Overall configuration of floodlight]
As shown in these figures, the floodlighting device 100 includes a main body unit 110, a heat radiating unit 120, and a protection unit 130.
The floodlighting device 100 of the present embodiment is typically used by arranging a plurality of floodlighting devices 100 in a matrix on the frame of the lighting tower.

(Main unit)
As shown in FIGS. 1, 2, 4, and the like, the main body unit 110 includes a light emitting unit assembly 111, a casing member 112, and a protective panel 113.

The light emitting unit assembly 111 is composed of an array of a plurality of (four in this embodiment) light emitting units 1111 equipped with a plurality of LEDs (light emitting elements). Each light emitting unit 1111 has the same configuration, and has a substantially rectangular LED substrate on which a plurality of LEDs are mounted, and a substantially rectangular lens having a plurality of lens portions arranged corresponding to the individual LEDs on the LED substrate. It is composed of a laminate with a substrate. The light emitting unit assembly 111 simultaneously causes the LEDs on each light emitting unit 1111 to emit light, and projects the illumination light to the front (front) through the lens substrate and the protective panel 113. The lighting color of the LED is not particularly limited, and is typically white.

The casing member 112 is made of a metal material such as an aluminum alloy, and has a substantially rectangular support plate 1121 parallel to the XY plane and a casing frame portion 1122 provided on the outer periphery of the support plate 1121. The support plate 1121 supports the light emitting unit assembly 111 and functions as a heat transfer plate that transfers heat generated from the light emitting unit assembly 111 on which a plurality of LEDs that are heat generating elements are mounted to the heat dissipation unit 120. The casing frame portion 1122 constitutes a side peripheral surface of the casing member 112, and partitions the accommodation space of the light emitting unit assembly 111 supported on the support plate 1121.

The casing member 112 further has a grip portion 1123 and a support portion 1124. The grip portion 1123 is a member for the user to grasp the grip portion 1123 and adjust the floodlight direction of the floodlight illumination device 100. The support portion 1124 is rotatably supported by an arm 1124a (see FIG. 8) for connecting the floodlight lighting device 100 to an external lighting tower main body (frame) or the like.

The protective panel 113 is made of a translucent member such as acrylic resin, and closes the opening in the light emitting direction of the Z-axis of the casing member 112 in which the light emitting unit assembly 111 is housed. To protect.

(Heat dissipation unit)
As shown in FIGS. 1, 4, and 5, the heat radiating unit 120 includes a plurality of heat radiating fins 121 and a plurality of heat pipes 124. The heat radiating unit 120 is arranged on the opposite side of the main body unit 110 in the light emitting direction, that is, on the back side (back side) of the support plate 1121.

The plurality of heat radiation fins 121 are substantially rectangular thin plates made of a metal material such as copper or aluminum having good thermal conductivity, are arranged parallel to the XY plane, and are arranged at intervals in the Z-axis direction. To. The plurality of heat pipes 124 are pipe-shaped members made of a metal material such as copper or aluminum having good thermal conductivity, and thermally connect the casing member 112 and the plurality of heat radiating fins 121. .. Each heat pipe 124 contains a working liquid inside, and transports the heat generated by the main body unit 110 to the plurality of heat radiating fins 121. The details of the heat dissipation unit 120 will be described later.

(Protection unit)
The protection unit 130 includes a connecting pipe 131, a guard member 132, and a terminal box 133.

The guard member 132 is made of a metal material, a resin material, or a combination thereof, and has an internal space for accommodating the heat dissipation unit 120. In the present embodiment, the guard member 132 has a rectangular parallelepiped shape in which one surface on the light emitting direction side is open. Is formed in. The four side surfaces and the back surface of the guard member 132 are made of punch metal, a lattice body (mesh), or the like, and have a structure that allows outside air to easily enter and exit. The guard member 132 is arranged between the support plate 1121 and the terminal box 133.

The terminal box 133 is made of a metal material, a resin material, or a combination thereof, and is installed on the outside of the back surface of the guard member 132. The terminal box 133 is connected to an external power source (commercial power source) and houses a wiring member (not shown) used for supplying necessary power to the main unit 110.

The connecting pipe 131 is a hollow pipe made of a metal material, a resin material, or the like (see cross-sectional views of FIGS. 9, 13 and the like). The connecting pipe 131 is arranged at the center of the heat radiating unit 120, and connects the casing member 112 and the terminal box 133 to each other. The connecting pipe 131 internally houses a cable group (not shown) that electrically connects the terminal box 133 and the light emitting unit assembly 111.

[Detailed configuration of heat dissipation unit]
Next, a detailed configuration of the heat dissipation unit 120 will be described with reference to FIGS. 6 to 12. 6 to 9 are views showing a state in which the guard member 132 and the terminal box 133 are removed. FIG. 6 is a rear view, FIG. 7 is a top view, FIG. 8 is a side view, and FIG. 9 is a view in FIG. It is a cross-sectional view of AA line. Further, FIG. 10 is a partial perspective view of the heat radiating unit 120. FIG. 11 is a rear view of one of the heat radiation fins 121, and FIG. 12 is a top view of the heat pipe 124.

As shown in FIGS. 6, 7, and 8, the heat dissipation unit 120 of the present embodiment is composed of an aggregate of a plurality of (four in this example) heat dissipation modules 120M arranged around the connecting pipe 131. Ru. Each heat dissipation module 120M includes a plurality of heat dissipation fins 121 and a plurality of heat pipes 124, and typically has the same configuration.

First, the heat pipe 124 will be described.

Each heat pipe 124 is made of a metal material having good thermal conductivity such as copper or aluminum. The heat pipe 124 may be configured as a uniform metal rod, but in the present embodiment, as shown in FIGS. 10 and 12, it has a substantially L-shape with a bent middle portion. Each heat pipe 124 has a heat receiving portion 1241 extending in the Y-axis direction, a heat transporting portion 1242 extending in the Z-axis direction (rearward), and a bent portion 1243 connecting the heat receiving portion 1241 and the heat transporting portion 1242. The heat pipes 124 are arranged on the back surface of the support plate 1121 of the main body unit 110 at equal pitches at predetermined intervals in the X-axis direction.

The support plate 1121 of the main unit 110 is provided with a plurality of grooves that are coupled to the heat receiving portion 1241 of each heat pipe 124. Typically, a filler such as grease or an adhesive is applied between the groove portion and the heat receiving portion 1241 so as not to generate a gap, and each heat receiving portion 1241 is supported by caulking or the like from above. It is crimped to the plate 1121. As a result, the main body unit 110 and each heat pipe 124 are mechanically and thermally connected to each other.

The plurality of heat pipes 124 are composed of two types of heat pipes, which are arranged alternately (see FIG. 10). For example, a heat pipe 124 whose direction from the bent portion 1243 to the tip of the heat receiving portion 1241 is parallel to the positive direction in the Y-axis direction is defined as a heat pipe 124L, and conversely, a heat pipe parallel to the negative direction in the Y-axis direction. When 124 is a heat pipe 124R, the heat pipe 124L and the heat pipe 124R are alternately arranged in the X-axis direction.

Next, the heat radiation fin 121 will be described.

As shown in FIGS. 6 and 11, each heat radiation fin 121 has a single hole portion 1211 in the center, and a plurality of heat transport portions 1242 of the heat pipe 124 are inserted around the hole portion 1211. The insertion portion 1212 is arranged. The hole portion 1211 is a rectangular through hole having a long side in the X-axis direction, and is formed at the same position and size in each heat radiation fin 121. Therefore, the holes 1211 of the heat radiation fins 121 are aligned so as to face each other in the arrangement direction (Z-axis direction) (see FIG. 6). As a result, the flow of outside air along the light projection direction (Z-axis direction) is promoted, so that heat can be efficiently dissipated even when the light projection direction is inclined downward.

The plurality of insertion portions 1212 are hole-shaped portions through which the heat pipes 124 are inserted one by one, and are formed at the same position and size in each of the heat radiation fins 121. In the present embodiment, the insertion portion 1212 is formed of a circular through hole, and the heat transport portion 1242 of the heat pipe 124 is pressure-inserted into the through hole. As a result, the adhesion between the insertion portion 1212 and the heat transport portion 1242 is improved, so that the heat transfer efficiency from the heat pipe 124 to the heat radiation fin 121 is improved.

In the present embodiment, as shown in FIG. 11, a plurality of insertion portions 1212 are arranged in an array in which they are aligned in the uniaxial direction (X-axis direction). By arranging the insertion portions 1212 in an array, the heat receiving portions 1241 of the heat pipe 124 can be densely arranged on the back surface of the support plate 1121, and the heat transfer efficiency from the main body unit 110 to the heat radiating unit 120 is improved.

Further, the insertion portion array 1214 is provided in a plurality of rows (two rows with the hole portion 1211 interposed therebetween as shown in FIG. 11) in one heat radiation fin 121. The arrangement position of the insertion portion array 1214 is the edge portion of the heat radiation fin 121. This arrangement has an advantage that the heat radiating fins 121 are stably supported by the heat pipe 124.

Further, since the L-shaped first and second heat pipes 124L and 124R are alternately arranged as the heat pipes 124, the arrangement pitch of the insertion portions 1212 of the heat radiation fins 121 is the heat pipes with respect to the support plate 1121. Each insertion portion 1212 through which the first heat pipe 124L is inserted and each insertion portion 1212 through which the second heat pipe 124R is inserted, which is half the pitch of the arrangement pitch of 124, are half pitches in the X-axis direction. Shifted (staggered). As a result, the degree of freedom in processing the insertion portion 1212 with respect to the heat radiation fin 121 can be increased, and the assembly workability can be improved.

Here, the hole portion 1211 functions as a through hole through which outside air can pass, and enhances the heat dissipation effect of each heat dissipation fin 121. Therefore, as shown in FIG. 11, the hole portion 1211 is composed of a rectangular opening extending along the arrangement direction of the insertion portion 1212, so that the distance between each insertion portion 1212 and the hole portion 1211 can be made uniform. As a result, variations in heat dissipation efficiency due to the generation of in-plane temperature distribution are suppressed. By optimizing the balance between the heat diffusion in each heat radiating fin 121 and the heat exchange efficiency with the outside air passing through the hole 1211, the heat radiating efficiency can be further improved. Further, each heat radiation fin 121 is reduced in weight by having the hole portion 1211. Therefore, the presence of the hole portion 1211 also contributes to the weight reduction of the entire floodlighting device 100 having a plurality of such heat radiation fins 121.

The number, size, shape, etc. of the holes 1211 are not limited to the illustrated examples. For example, a plurality of hole portions 1211 may be provided in the alignment direction of the insertion portion array 1214. Further, the shape is not limited to a rectangle, and may be a circle, an ellipse, or a combination of these shapes.

The heat radiating fin 121 further has a heat radiating portion 1213 having a predetermined area between the hole portion 1211 and the insertion portion array 1214. The heat radiating portion 1213 is formed with a heat radiating area sufficient to dissipate heat by contact with the outside air while diffusing the heat transported through each insertion portion 1212 in the plane of the heat radiating fin 121. Therefore, if the insertion portion array 1214 of the heat radiating fin 121 is provided at a position as far as possible from the hole portion 1211, the area of the heat radiating portion 1213 can be expanded. Further, by providing the insertion portion array 1214 in the vicinity of the peripheral edge portion of the heat radiation fin 121, the heat radiation fin 121 can be supported more stably by the heat pipe 124.

[Mounting structure of heat dissipation unit]
Next, the mounting structure of the heat radiating unit 120 with respect to the main body unit 110 will be described with reference to FIGS. 7, 8 and 13. FIG. 13 is a sectional view taken along line AA in FIG.

As shown in FIGS. 7 and 8, the individual heat dissipation modules 120M constituting the heat dissipation unit 120 are connected to predetermined positions of the support plate 1121 of the main body unit 110, respectively. Each heat dissipation module 120M has a plurality of heat dissipation fins 121 including a lowermost heat dissipation fin 122 and an uppermost heat dissipation fin 123. The lowermost heat radiation fin 122 is a heat radiation fin 121 closest to the main body unit 110, and is different from other heat radiation fins 121 in that it has a plurality of connection holes 1221 through which a screw member screwed into the support plate 1121 is inserted.

On the other hand, the support plate 1121 has a plurality of support members 114 provided at positions facing each connection hole 1221 of the lowermost heat dissipation fin 121 of each heat dissipation module 120M. Each support member 114 is composed of a protrusion formed integrally with the support plate 1121, has a top portion that abuts on the heat radiation fin 122, and the screw member for inserting the connection hole 1221 is coupled to the top portion. ..

The connection hole 1221 and the support member 114 are arranged near the four corners of the lowermost heat radiation fin 122, for example, as shown in FIG. As a result, each heat dissipation module 120M is stably supported by the main body unit 110. Further, each heat dissipation module 120M can be supported by the entire support plate 1121, and stress concentration can be avoided at the connection portion between the support plate 1121 and the heat receiving portion 1241 of each heat pipe 124. Further, since a stable thermal connection state between the support plate 1121 and each heat pipe 124 can be ensured, stable heat dissipation characteristics can be maintained without being affected by disturbances such as vibration and shock. ..

The terminal box 133 has a spacer 1331 that comes into contact with the heat radiation fin 121 farthest from the support plate 1121, that is, the uppermost heat radiation fin 123 among the plurality of heat radiation fins 121 of each heat dissipation module 120M. Specifically, as shown in FIG. 13, the spacer 1331 is provided on the inner surface of the terminal box 133 (the surface facing the support plate 1121), and is made of a metal material or the like. The spacer 1331 is fixedly attached to the terminal box 133, and abuts on a part of the heat radiation fin 123 by connecting the terminal box 133 and the connecting pipe 131. The spacer 1331 may have an appropriate elasticity so that each heat dissipation module 120M can be pressed along the Z-axis direction (toward the main body unit 110).

The terminal box 133 is screwed to the connecting pipe 131 in a state of being in contact with the heat radiating unit 120 as described above. Therefore, in the heat dissipation unit 120, the heat pipe 124 is mechanically connected to the main body unit 110, the lowermost heat dissipation fin 122 is fixed to the support member 114, and at the same time, the uppermost heat dissipation fin 123 comes into contact with the terminal box 133. As a result, it is sandwiched between the main body unit 110 and the terminal box 133, and is supported more stably.

In general, the mechanical stress applied to the fixed portion between the main body unit and the heat radiating unit tends to increase as the heat radiating unit becomes larger and the heat radiating unit becomes taller as the number of heat radiating fins arranged increases. On the other hand, in the floodlighting device 100 of the present embodiment, the heat radiation fin 121 (lowermost heat radiation fin 122) closest to the support plate 1121 among the plurality of heat radiation fins 121 is supported by the support member 114. ing. As a result, the heat radiating unit 120 can be stably supported without causing stress concentration at the connection portion between the heat receiving portion 1241 of the heat pipe 124 and the support plate 1121.

Further, in the present embodiment, the heat dissipation unit 120 is configured to be sandwiched between the main body unit 110 and the protection unit 130 (cover member 132, terminal box 133). As a result, the stress concentration on the connection portion between the main body unit 110 and the heat radiating unit 120 can be further relaxed, and the heat radiating unit 120 can be supported more stably with a simple configuration. In addition, it is possible to easily cope with the increase in size and height of the heat dissipation unit 120.

On the other hand, the guard member 132 is sandwiched between the support plate 1121 and the terminal box 133. The guard member 132 covers the entire heat dissipation unit 120, while its opening-side end 1332 fits into a rectangular annular groove 1125 provided on the periphery of the support plate 1121 (see FIGS. 6, 9, and 13). ). By fixing the connecting pipe 131 and the terminal box 133, the guard member 132 is stably supported between the support plate 1121 and the terminal box 133 without the need for a special fixture.

[Heat dissipation effect of floodlight]
In the floodlighting device 100 of the present embodiment configured as described above, when the power is turned on to the main body unit 110, a plurality of LEDs on the light emitting unit assembly 111 simultaneously emit light, and illumination with a predetermined illuminance in the front direction. Light is projected. On the other hand, the heat generated by the light emitting operation of each LED is transferred to the plurality of heat pipes 124 via the support plate 1121 of the casing member 112, and is dissipated from the plurality of heat radiating fins 121.

In the present embodiment, since each of the plurality of heat radiation fins 121 is arranged parallel to the support plate 1121, the temperature distribution in the plane of each heat radiation fin 121 can be suppressed to be small. As a result, the area of each heat radiating fin 121 can be effectively utilized, so that the heat radiating effect can be improved.

For example, in FIGS. 14A and 14B, the temperature distribution states of the main body unit 110 and the heat dissipation unit 120 during operation (light emission) of the floodlight lighting device 100 in a posture in which the X-axis direction is oriented in the vertical axis direction. The simulation result which shows an example is shown. More specifically, (a) shows the temperature distribution of a part of the light emitting surface (front surface) of the main body unit 110 in the steady state when a predetermined time has passed after the light emission, and (b) shows the heat dissipation in the above steady state. The temperature distribution in a part of the uppermost stage (rearmost surface) of the unit 120 is shown. In the figure, the higher the temperature, the higher the gray density.

As shown in FIGS. 14A and 14B, both the main body unit 110 and the heat radiating unit 120 have a higher temperature on the upper side than on the lower side in the drawing. This is due to the transfer of heat upwards. Further, as shown in FIG. 14B, since the in-plane temperature of the heat radiating fins 121 (123) is uniform or substantially uniform, according to the present embodiment, the entire area of each heat radiating fin 121 is effectively utilized. It is clear that an excellent heat dissipation effect can be obtained.

On the other hand, FIG. 15 shows a configuration example of the floodlight lighting device 200 according to a comparative example including a plurality of heat radiation fins 221 arranged perpendicularly to the support plate 2121 of the main body unit 210. As shown in the figure, the heat radiation fins 221 are arranged in the horizontal direction (Y-axis direction) orthogonal to the light projection direction (Z-axis direction), and each is inserted into the U-shaped heat pipe 224. , Is thermally connected to the support plate 2121.

16 (a) and 16 (b) show simulation results showing an example of the temperature distribution state of the main unit 210 and the heat radiation fin 221 evaluated under the same conditions as those of FIGS. 14 (a) and 14 (b). As shown in FIG. 16B, with respect to the heat radiation fin 221 on the lower stage side, a large temperature distribution is generated between the main body unit 210 side (left side in the figure) and the opposite side (right side in the figure). From this, it can be seen that efficient heat dissipation is not performed by utilizing the entire area of the heat radiation fin 221. On the other hand, although the heat radiation fins 221 on the upper stage side show a uniform temperature distribution, they are more concentrated than the heat radiation fins of the present embodiment shown on the upper stage side in FIG. 14 (b). It can be seen that it is in a high temperature state. As a result, as shown in FIG. 16A, the exhaust heat of the main body unit 210 is not promoted, and the high temperature region is expanded as compared with FIG. 14A.

As described above, according to the present embodiment, since a heat dissipation effect superior to that of the comparative example can be obtained, the heat exhaust efficiency from the main body unit 110 can be greatly improved. As a result, stable light emission operation of the main body unit can be ensured.

Further, according to the present embodiment, since each heat radiation fin 121 is provided with a hole portion 1211 penetrating in the light projection direction (Z-axis direction), the inclination of the light projection illumination device 100 is any angle. However, the outside air easily flows through the heat radiating unit 120, which increases the heat exchange efficiency with each heat radiating fin, so that a stable heat radiating effect can be obtained.

Further, since the hole portion 1211 is provided in each heat radiation fin 121 to ensure the flow of outside air in the light projection direction, heat is dissipated as compared with the structure in which the heat radiation fin is divided into two at the formation position of the hole portion 1211. The number of fins installed can be reduced. As a result, the man-hours for assembling the heat radiating unit 120 can be reduced, and the supporting strength of the heat radiating fins 121 with respect to the heat pipe 124 can be secured.

The present invention is not limited to the embodiments described above, and various other embodiments can be realized.

For example, in the above embodiment, the floodlighting device using an LED as a light source has been described as an example, but the present invention is not limited to this, and the floodlighting device using a light emitting element by another method as a light source is also used. The invention is applicable.

Further, in the above embodiment, the example in which a plurality of floodlighting devices 100 are arranged and used in a matrix on the frame of the lighting tower has been described, but the present invention is not limited to this, and the floodlighting device 100 may be used alone.

100 ... Floodlighting device 110 ... Main unit (heating element)
111 ... Light emitting unit assembly 1111 ... Light emitting unit 112 ... Casing member 1121 ... Support plate 1122 ... Casing frame part 1123 ... Grip part 1124 ... Support part 113 ... Protective panel 114 ... Support member 120 ... Heat dissipation unit 120M ... Heat dissipation module 121 ... Heat dissipation Fins 1211 ... Holes 1212 ... Insertion 1213 ... Heat dissipation 1214 ... Insertion array 122 ... Bottom heat dissipation fins 1221 ... Connection holes 123 ... Top heat dissipation fins 124 ... Heat pipe 1241 ... Heat receiving part 1242 ... Heat transport 1243 ... Bending Part 130 ... Protection unit 131 ... Connecting pipe 132 ... Guard member 133 ... Terminal box 1331 ... Spacer

Claims (6)

A main body unit having a plurality of light emitting elements that emit light in the first axial direction and a support plate that supports the plurality of light emitting elements.
A plurality of heat pipes that are thermally connected to the support plate and transport heat from the support plate in the first axial direction.
Each has a hole portion and a plurality of insertion portions arranged around the hole portion and inserted by the plurality of heat pipes, arranged in parallel with the support plate, and spaced apart from each other in the first axial direction. With multiple heat dissipation fins arranged in
A terminal box configured to supply power to the main unit and
A connecting pipe for connecting the support plate and the terminal box is provided.
The terminal box is a floodlighting device having a spacer that abuts the heat radiating fin farthest from the support plate among the plurality of heat radiating fins by connecting the terminal box and the connecting pipe . The floodlighting device according to claim 1.
A floodlighting device in which the holes of each of the plurality of heat radiation fins face each other in the first axial direction. The floodlighting device according to claim 1 or 2.
The plurality of insertion portions are floodlighting devices arranged in multiple rows with the hole portions interposed therebetween. The floodlighting device according to claim 3.
The hole is a floodlighting device composed of a rectangular opening extending along an arrangement direction of the plurality of insertion portions. The floodlighting device according to any one of claims 1 to 4.
Each of the plurality of heat pipes has a heat receiving portion connected to the support plate, a heat transporting portion inserted into each of the plurality of insertion portions, and a bent portion connecting the heat receiving portion and the heat transporting portion. Floodlighting device to have. The floodlighting device according to claim 5.
The plurality of heat pipes
A plurality of first heat pipes in which the heat receiving portion extends in parallel with the second axial direction orthogonal to the first axial direction from the bent portion.
A plurality of second heat pipes in which the heat receiving portion extends from the bent portion in a direction parallel to the second axial direction and in a direction opposite to the heat receiving portion of the plurality of first heat pipes.
A floodlighting device in which the plurality of first and second heat pipes are alternately arranged in a third axial direction orthogonal to the first and second axial directions with respect to the support plate.