JP2015144044A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire which can quickly radiate heat generating from a light source with a simple structure, and which can surely prevent overheat of the light source without causing increase in weight and cost.SOLUTION: A heat radiating body 50 is provided on a rear surface side of a body 11 in which a light source 20 is mounted, and the heat radiating body 50 is configured by combining a plurality of heat pipes 51 and a plurality of heat radiation fins 55 through which each of the heat pipes 51 penetrates. The heat radiation fins 55 are disposed in a state where they are arranged side by side facing with each other in parallel respectively, a heat radiation part 53 of each heat pipe 51 penetrates through each of the heat radiation fins 55, one end edges of long side 55a out of the peripheral edges of each of the heat radiation fins 55 are fixed in a convexoconcave manner with each other and arranged side by side with respect to a reference surface alternately.

Description

  The present invention relates to a lighting device including a main body on which a light source is mounted, and a radiator provided on the back side opposite to the front surface side on which the light source is mounted. It is applied to the floodlights installed in stadiums.

  Conventionally, a projector, which is a kind of lighting device, generally uses a discharge lamp such as a metal halide lamp or a sodium lamp having high brightness and high efficiency as a light source. However, such a discharge lamp has not only high power consumption and high running cost, but also has a characteristic that the pressure in the discharge tube increases when it is turned on. For this reason, there is a possibility that the lamp may burst at the end of the lifetime where the aging has progressed, and there was also a safety concern.

  Therefore, recently, a projector using an LED (light emitting diode) as a light source instead of a discharge lamp has been proposed (see, for example, Patent Document 1). However, when the LED is used as a light source in this way, the LED generates a large amount of heat when it is driven to light, and thus it is necessary to devise heat dissipation that prevents the LED from being overheated. However, Patent Document 1 does not suggest any configuration related to heat dissipation. Therefore, there is a possibility that the original durability and long life of the LED may be impaired.

  Moreover, although it is not a projector, the thing provided with the thermal radiation unit which absorbs and discharge | releases the heat which generate | occur | produced from LED in the illuminating device which used LED as the light source has already been proposed (for example, refer patent document 2). The heat dissipating unit here is composed of a plurality of heat pipes and a plurality of heat dissipating fins connected in a state where each heat pipe penetrates, and has substantially the same configuration as a conventional heat dissipating unit already known. (For example, see Patent Documents 3 and 4).

JP-A-10-208502 JP 2013-077755 A JP 2011-165703 A JP-A-7-176660

  However, in the conventional heat radiating units described above, the heat radiating fins are formed in a rectangular shape having the same size, and these four fins are arranged so that the four sides are aligned on the same plane. With such a structure, the heat radiation fins that are closely adjacent to each other heat each other over the entire area, and the heat radiation efficiency of the entire heat radiation unit has been greatly reduced. Therefore, in order to sufficiently prevent the LED from being overheated, the number and size of the heat dissipating fins must be increased, resulting in a problem of increasing the weight and increasing the cost.

  In addition, in the projector using the LED described in Patent Document 1 as the light source as described above or the illumination device described in Patent Document 2, the printed wiring board on which the light emitting module is mounted is housed in the housing opened on the front side. A translucent cover that irradiates light from the light emitting module forward is provided on the front side of the housing. Therefore, when the housing becomes larger as the capacity of the projector increases, the weight increases and the assembly work and installation work become troublesome. Further, in the case of forced ventilation by the fan described in Patent Document 2, there is a problem that the weight is increased and the cost is increased.

  The present invention has been made paying attention to the problems of the conventional techniques as described above, and it is possible to quickly release the heat generated from the light source with a simple configuration, resulting in an increase in weight and cost. Without overheating, it is possible to reliably prevent overheating of the light source, maintain the proper brightness and life of the light source, and suppress the increase in weight associated with the increase in capacity, simplifying assembly and installation work. It aims at providing the illuminating device which can be performed to.

The gist of the present invention for achieving the object described above resides in the inventions of the following items.
[1] A main body (11) on which a light source (20) is mounted, and a radiator (50) provided on the back side opposite to the front surface side on which the light source (20) is mounted on the main body (11). In the lighting device (10) comprising:
The heat radiator (50) is connected to a plurality of heat pipes (51) that absorb heat received by the main body (11) from the light source (20), and the heat pipes (51) pass through the heat radiator (50). A plurality of heat dissipating fins (55) that release
Each of the heat pipes (51) has a heat receiving part (52) on one end side connected to the back side of the main body (11), and a heat radiating part (53) on the other end side separated from the back side of the main body (11). Extended to the state to
The heat radiating fins (55) are arranged in parallel and facing each other, and the heat radiating portions (53) of the heat pipes (51) penetrate through the radiating fins (55), respectively. Among them, at least one end edge facing in the same direction is fixed in a concavo-convex shape alternately arranged with respect to the reference plane, respectively, and the illumination device (10).

  [2] Each of the heat dissipating fins (55) is formed in a rectangular shape having the same size, and is arranged in a state where the long side and the short side that are paired are aligned in the same direction, and the long side and / or The illuminating device (10) according to [1] above, wherein the short side edges are fixed in an uneven shape arranged alternately with respect to the reference plane.

  [3] The heat radiating portions (53) of the heat pipes (51) are arranged in a staggered manner at positions where the distances from the back surface side of the main body (11) are alternately different with respect to the heat radiating fins (55). The lighting device (10) according to [1] or [2], wherein the lighting device (10) is fixed through.

  [4] The heat radiator (50) forms a block-like unit in which the heat pipes (51) and the heat radiation fins (55) are fixed to each other in advance, and the back surface of the main body (11) A lighting device (10) according to [1], [2] or [3] above, wherein a plurality of units are provided on the side.

  [5] At least any two of the units are vertically opposed to each other on the back surface side of the main body (11), and a ventilation space is formed in which a gap between the heat radiating fins (55) is continuous in the vertical direction. The lighting device (10) according to [4] above, which is characterized.

Next, the operation based on the above solution will be described.
According to the illuminating device (10) described in the above [1], the heat generated from the light source (20) is transmitted to the heat radiating body (50) and released, so that the light source (20) is prevented from excessively generating heat. be able to. That is, the heat generated from the light source (20) is transmitted to the back side of the main body (11) and reaches the heat receiving part (52) which is one end side of the heat pipe (51) of the heat radiating body (50).

  In the heat pipe (51), hydraulic fluid (for example, pure water or hydrofluorocarbon) is sealed under reduced pressure, and the hydraulic fluid heated by the heat receiving portion (52) on one end side evaporates and vaporizes, and heat It moves in the pipe (51) and reaches the heat radiating part (53) on the other end side. The hydraulic fluid transfers heat to the radiating fin (55) in the heat radiating section (53), and the hydraulic fluid cooled by the air condenses and liquefies, and returns to the heat receiving section (52) again by a capillary phenomenon or the like. As described above, the working fluid repeatedly evaporates or condenses, whereby the heat of the main body (11) is radiated to the outside.

  In the heat dissipating body (50), the heat dissipating fins (55) are arranged to face each other in parallel, and the heat dissipating portions (53) of the heat pipes (51) penetrate the respective heat dissipating fins (55). ), At least one end edges facing in the same direction are fixed in a concave-convex shape alternately arranged with respect to the reference plane. Thus, the heat radiating fins (55) do not interfere with each other so as to warm up over the entire area, and at least at one end edge arranged in the concavo-convex shape, the heat radiating fins (55) face each other. A space with a large width is secured between the radiating fins (55), and the heat radiation efficiency can be improved.

  Further, since the main body (11) provided with the light source (20) and the heat radiating body (50) has a frame structure of the entire lighting device (10), it is not necessary to prepare a separate housing, and other lenses. Parts such as a cover and a cover can be directly attached to the main body (11). Thereby, the increase in the weight accompanying the increase in capacity of the entire lighting device (10) can be suppressed, and the assembly work and the installation work can be easily performed.

  According to the illuminating device (10) described in the above [2], each radiating fin (55) is formed in a rectangular shape having the same size, and the paired long side and short side face the same direction. The edges of the long side and / or the short side are fixed in a concavo-convex shape arranged alternately with respect to the reference plane.

  Thereby, it is not necessary to prepare a plurality of types of heat dissipating fins (55) of different sizes and shapes, and after sharing the parts of the heat dissipating body (50), these end edges are arranged alternately with respect to the reference plane. It can arrange | position in uneven | corrugated shape. Specifically, in the case of a vertically long rectangle, the long sides serving as both side edges are staggered in the height direction between only the upper and lower short sides while being aligned with the reference surfaces on both sides. What is necessary is just to fix to a different position. Alternatively, it is conceivable that the upper and lower short sides are aligned and the left and right long sides are staggered, and that both the short side and the long side are staggered.

  According to the illuminating device (10) described in [3] above, the heat radiating portion (53) of each heat pipe (51) is from the back surface side of the main body (11) with respect to each heat radiating fin (55). Are fixed to penetrate in a staggered manner at different positions. Thereby, not only the said heat radiation fin (55) but interference with each heat pipe (51) can be avoided as much as possible, and heat dissipation efficiency can be improved further.

  According to the illuminating device (10) described in [4] above, the radiator (50) forms a block-like unit in which the heat pipes (51) and the radiation fins (55) are fixed to each other in advance. And by providing a plurality of units on the back surface side of the main body (11), the plurality of units can be appropriately arranged so as to be distributed over the entire area of the back surface side of the main body (11), and is not locally dissipated. It is possible to prevent the occurrence of the occurrence of heat and the bias of the heat radiation location.

  According to the illuminating device (10) described in [5], at least any two of the units of the radiator (50) are vertically opposed to each other on the back side of the main body (11), and each of the radiating fins. (55) A clearance space is formed in which the gap between them is continuous in the vertical direction. Thereby, it becomes possible to make the flow of the heated air smooth, and to improve heat dissipation efficiency further.

According to the illumination device of the present invention, it is possible to quickly release heat generated from the light source with a simple configuration, and it is possible to reliably prevent overheating of the light source without causing an increase in weight or cost. Appropriate brightness and lifetime can be maintained.
Further, an increase in weight due to an increase in capacity of the entire lighting device can be suppressed, and assembly work and installation work can be easily performed.

It is a perspective view which shows the illuminating device which concerns on embodiment of this invention. It is a front view which shows the illuminating device which concerns on embodiment of this invention. It is a side view which shows the illuminating device which concerns on embodiment of this invention. It is a rear view which shows the illuminating device which concerns on embodiment of this invention. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG. It is a front view which shows the surface side of the main body of the illuminating device which concerns on embodiment of this invention. It is a perspective view which shows the back surface side of the main body which has arrange | positioned the heat radiator of the illuminating device which concerns on embodiment of this invention. It is the elements on larger scale of FIG. It is a rear view which shows the main body which has arrange | positioned the heat radiator of the illuminating device which concerns on embodiment of this invention. It is a top view which shows the main body which has arrange | positioned the heat radiator of the illuminating device which concerns on embodiment of this invention. It is a side view which shows the main body which has arrange | positioned the heat radiator of the illuminating device which concerns on embodiment of this invention. It is a side view which expands and shows the heat radiator of the illuminating device which concerns on embodiment of this invention. It is a perspective view which expands and shows the heat radiator of the illuminating device which concerns on embodiment of this invention. It is a front view which expands and shows the heat radiator of the illuminating device which concerns on embodiment of this invention. It is a side view which expands and shows the heat radiator of the illuminating device which concerns on embodiment of this invention. It is explanatory drawing which shows the result of the thermal analysis which confirmed the heat dissipation effect of the illuminating device which concerns on embodiment of this invention. It is explanatory drawing which shows the result of the thermal analysis which confirmed the heat dissipation effect of the illuminating device which concerns on embodiment of this invention. It is explanatory drawing which shows the result of the thermal analysis which confirmed the heat dissipation effect of the illuminating device which concerns on embodiment of this invention. It is explanatory drawing which shows the result of the thermal analysis which confirmed the heat dissipation effect of the conventional illuminating device. It is explanatory drawing which shows the result of the thermal analysis which confirmed the heat dissipation effect of the conventional illuminating device. It is explanatory drawing which shows the result of the thermal analysis which confirmed the heat dissipation effect of the conventional illuminating device. It is the bar graph which compared the result of the thermal analysis in the illuminating device which concerns on embodiment of this invention, and the conventional illuminating device.

Hereinafter, an embodiment representing the present invention will be described with reference to the drawings.
1 to 23 show an embodiment of the present invention.
FIG. 1 is a perspective view showing the lighting device 10, and FIG. 2 is a front view showing the lighting device 10. FIG. 3 is a side view showing the lighting device 10, and FIG. 4 is a rear view showing the lighting device 10. 5 is a cross-sectional view taken along line VV in FIG. 2, and FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. FIG. 7 is a front view showing the surface side of the main body 11 of the lighting device 10.

  As shown in FIGS. 1 to 7, the illumination device 10 includes a main body 11 on which an LED (light emitting diode) 20 that is a light source is mounted, a lens 30 disposed to face the main body 11, and the lens 30. In addition to the globe 40 that transmits the light emitted from the main body 11, the heat sink 50 (see FIG. 5) provided in the main body 11 is included. Hereinafter, the example which applied the illuminating device 10 to the light projector installed in an outdoor stadium etc. is demonstrated.

  First, the main body 11 also serves as a frame structure of the lighting device 10, and is formed in a substantially hexagonal plate shape as a whole, and is configured with a considerable strength mainly by a metal such as an aluminum alloy. As shown in FIG. 7, a printed wiring board 12 on which the LED 20 is mounted is disposed on the surface side of the main body 11. Although not shown in the figure, circuit wiring terminals are formed on the printed wiring board 12, and a plurality of LEDs 20 are mounted on the circuit wiring terminals. Note that the printed wiring board 12 does not need to be an integrally molded product, and in this embodiment, the printed wiring board 12 is a combination of those that are radially divided from the center of the main body 11.

  Here, the LED 20 is not limited to an LED lamp in which a light emitting element is embedded in a substantially bullet-shaped mold, but may be an LED chip including only a light emitting element mounted on a lead wire. The emission color of the LED 20 is a design matter that can be selected as appropriate. Further, the plurality of LEDs 20 are arranged so as to be sequentially arranged in a concentric hexagonal shape from the center of the main body 11 to the outside, for example. In addition, in FIG. 5 to FIG. 7, the individual shapes of the LEDs 20 are omitted, and are denoted by reference numeral 20 as a whole.

  A round hole 13 is formed in the center of the main body 11. The round hole 13 is for passing a signal line (not shown) connected to the LED 20 of the printed wiring board 12 so as to guide from the front surface side to the back surface side of the main body 11. As shown in FIG. 5, a terminal block unit 14 is disposed at the center of the back surface side of the main body 11, and the other end of the signal line passing through the round hole 13 is connected to the terminal block unit 14. Yes.

  The terminal block unit 14 has a structure sealed with a dedicated case, and is attached in a state of being separated from the back surface of the main body 11. A plurality of radiators 50 are provided on the back side of the main body 11 so as to surround the terminal block unit 14. Details of the radiator 50 will be described later. The terminal block unit 14 supplies power to each LED 20, and a power line (not shown) extending to the outside is also connected. The terminal block unit 14 may include a control unit for controlling the lighting drive of each LED 20.

  5 and 6, the lens 30 directs the irradiation light from each LED 20 forward, and is disposed in a state of covering the front of each LED 20 immediately. Specifically, for example, the lens 30 is formed by integrally forming a convex lens portion 31 corresponding to each LED 20 on a thin and colorless base plate. Here, the convex lens unit 31 converges each irradiation light in the direction of the optical axis and directs it forward, corresponding to each LED 20.

  The lens 30 does not need to be an integrally molded product. For example, as in the case of the printed wiring board 12, a lens that is radially divided into six from the center of the main body 11 may be combined. Here, it is preferable to provide an opening at the center of the lens 30 so as to match the round hole 13 of the main body 11 so that the round hole 13 can be seen from the outside. The lens 30 is also disposed on the surface side of the main body 11.

  The globe 40 transmits the irradiation light from the lens 30 forward, and is formed in a hexagonal and shallow case shape that matches the periphery of the main body 11. The globe 40 is attached to the front side of the main body 11 so as to surround and store the LED 20 and the lens 30. In this case, the flange along the outer periphery of the globe 40 is fixed to the periphery of the main body 11 with a screw or the like. It is good to intervene.

  Specifically, a transparent synthetic resin such as polycarbonate is suitable for the material of the globe 40, but it is not limited to being colorless and transparent, and may be colored according to the light emission color of the LED. In addition, the globe 40 may have a function of diffusing light as well as simply transmitting the irradiation light. Furthermore, in the present embodiment, the lens 30 is attached to the main body 11 side. However, the lens 30 may be attached to the globe 40 side, or the lens function may be added to the globe 40 itself. good.

  Next, the heat radiating body 50 constituting the basis of the present invention will be described. FIG. 8 is a perspective view showing the back side of the main body 11 in which the radiator 50 is arranged, and FIG. 9 is a partially enlarged view of FIG. 10 is a rear view of the main body 11 in which the radiator 50 is arranged, FIG. 11 is a plan view of the main body 11 in which the radiator 50 is arranged, and FIG. 12 is a side view of the main body 11 in which the radiator 50 is arranged. FIG. 13 is an enlarged side view showing the radiator 50, and FIG. 14 is an enlarged perspective view showing the radiator 50. As shown in FIG. FIG. 15 is an enlarged front view showing the radiator 50, and FIG. 16 is an enlarged side view showing the radiator 50.

  As shown in FIGS. 8 to 16, the heat radiating body 50 is connected to a plurality of heat pipes 51 that absorb the heat received by the main body 11 from the LEDs 20, and the heat pipes 51 pass through, and emits heat. A plurality of heat radiation fins 55 are combined. Hereinafter, the heat radiating body 50 may refer to individual units, or may collectively refer to each unit.

  The heat pipe 51 is made by sealing a working fluid (for example, pure water, hydrofluorocarbon, etc.) in a reduced pressure state inside a dedicated tube processed from a metal such as copper or aluminum having a high thermal conductivity. Therefore, it is bent into a substantially U shape. In the present embodiment, the radiator 50 is composed of two types of heat pipes 51A and 51B having different lengths. Hereinafter, when the two types of heat pipes 51A and 51B are generically referred to, they are simply referred to as heat pipes 51.

  The heat pipe 51 includes a heat receiving portion 52 that is a straight portion on one end side, a heat radiating portion 53 that is a straight portion on the other end side, and a space between the heat receiving portion 52 and the heat radiating portion 53 in a substantially U shape in FIG. A curved intermediate portion 54 to be connected is integrally formed. In such a heat pipe 51, the working fluid evaporated by the temperature rise of the heat receiving portion 52 moves to the heat radiating portion 53, and after the heat radiating in the heat radiating portion 53, the working fluid is condensed and liquefied again. To dissipate heat to the outside.

  The heat pipes 51 are arranged so that the heat pipes 51A and the heat pipes 51B are alternately arranged in parallel at equal intervals, and radiating fins 55 to be described later are combined and fixed in advance. It is configured as a unit. The overall lengths of the heat pipe 51A and the heat pipe 51B are the same. The heat pipe 51A has a longer heat receiving part 52 due to the shorter intermediate part 54, and the heat pipe 51B has a longer heat receiving part 52 due to the longer intermediate part 54. Is short. In addition, it is advantageous for cost reduction by using the heat pipes 51A and 51B having the same overall length as the current product. Alternatively, the heat receiving portion 52 of the heat pipe 51B is also extended to the same length as the heat pipe 51A, which is advantageous for heat dissipation efficiency.

  Here, the heat receiving portions 52 of the respective heat pipes 51 are arranged so as to be arranged on the same plane, and the respective heat receiving portions 52 are screwed, caulked, welded, or the like to the back surface side of the main body 11. Are connected together. In addition, if the groove | channel which partially embeds the heat receiving part 52 of each heat pipe 51 is provided in the back surface side of the main body 11, while positioning at the time of attachment of the heat sink 50, it is easy and the heat receiving part 52 with respect to the main body 11 is equipped. The contact area can be increased.

  On the other hand, the heat radiating portion 53 of each heat pipe 51 extends to be separated from the back surface side of the main body 11 via the intermediate portion 54, and is disposed so as to penetrate the heat radiating fin 55 described below. . Here, in the heat pipe 51A where the intermediate portion 54 is short, the height position of each heat radiating portion 53 is a position where the distance from the back surface side of the main body 11 is short and low by the short intermediate portion 54, and the intermediate portion 54 is long. In the heat pipe 51 </ b> B, the distance from the back surface side of the main body 11 is long and high as the intermediate portion 54 is long. Therefore, the heat radiating portions 53 of the heat pipes 51 are fixed to the heat radiating fins 55 in a staggered manner at positions where the distances from the back surface side of the main body 11 are alternately different.

  The heat radiation fin 55 is a metal thin plate material such as copper or aluminum having a high thermal conductivity, and is formed in a rectangular shape having the same size. The plurality of heat radiating fins 55 are arranged in parallel and facing each other, and the heat radiating portions 53 of the respective heat pipes 51 are fixed to penetrate each. Here, at least one end edges of the radiating fins 55 facing in the same direction are fixed in a concavo-convex shape alternately arranged with respect to the reference plane. Strictly speaking, the pair of heat radiating fins 55 arranged at both ends has a slightly shorter overall length in the longer side direction than the other pair. Further, as shown in FIG. 13, it is not always necessary that all the edges are continuously arranged in an uneven shape, and an arrangement in which adjacent edges are arranged on the reference plane may be included in a part.

  As shown in FIG. 14, each radiating fin 55 is arranged in a state in which the paired long side 55a and short side 55b are aligned in the same direction, and the edges of the long side 55a are respectively set to the reference plane. Are fixed in an uneven pattern. Here, a space is formed in which the gap between the edges of the long sides 55a arranged every other long side is widened twice as much as the length by which the edges of the long sides 55a are shifted from each other. As shown in FIG. 15, the edges of the short sides 55b are aligned on the reference surface except for the both ends described above, but the edges of the short sides 55b are also staggered with respect to the reference surface. You may arrange in the uneven | corrugated shape to line up.

  As shown in FIG. 10, a total of six units of the radiator 50 are disposed on the back side of the main body 11 so as to surround the terminal block unit 14. Here, among the units, two units arranged one above the other with the terminal block unit 14 therebetween are opposed to each other in the vertical direction, and the gap between the heat radiation fins 55 in each unit is continuous in the vertical direction. A space is formed. In addition, as shown in FIG. 5, the terminal block unit 14 is attached in the state spaced apart from the back surface of the main body 11 via the support | pillar member 14a, and does not block the middle of the said ventilation space.

  Furthermore, as shown in FIG. 5, arm attachment portions 70 that protrude rearward are provided at both ends on the back side of the main body 11, and the lighting device 10 is placed between the arm attachment portions 70 on the ceiling or the like. An arm 71 and a pedestal 72 are provided for mounting at the installation location. The hinge portion 73 pivotally supported by the arm mounting portion 70 on the upper end side of the arm 71 is provided with an adjuster mechanism that can adjust the irradiation angle by supporting the angle adjustment. The pedestal 72 is a part that integrally connects both ends of the arm 71, and the arm 71 and the pedestal 72 are formed by bending one metal piece. The pedestal 72 is a part that is fixed to the installation location with a bolt or the like.

Next, the effect | action of the illuminating device 10 which concerns on this Embodiment is demonstrated.
The illuminating device 10 is used by being installed, for example, at an installation location on the ceiling or the like of an outdoor stadium. After fixing the pedestal 72 to the installation location, the orientation of the globe 40 can be adjusted with the hinge 73 of the arm 71 as the center, and the illumination device 10 can be supported at an arbitrary irradiation angle. By using the LED 20 as the light source of the illumination device 10, the LED characteristics are low power consumption, long life, and labor and power costs for replacement can be reduced at low cost.

  In FIG. 6, the irradiation light from the LED 20 is directed forward through the lens 30, passes through the globe 40 as it is, and is irradiated forward. Here, the globe 40 is attached so as to seal the surface side of the main body 11, and foreign matter such as water and dust can be prevented from entering the inside thereof. The heat generated during the lighting of the LED 20 is transmitted from the front surface side of the main body 11 on which the printed wiring board 12 on which the LED 20 is mounted is disposed to the back surface side, and one end side of the heat pipe 51 of the radiator 50 on the back surface side. Is transmitted to the heat receiving portion 52.

  The working fluid is sealed in the heat pipe 51 under reduced pressure, and the working fluid heated by the heat receiving portion 52 on one end side evaporates and vaporizes, moves inside the heat pipe 51 and moves to the heat radiating portion 53 on the other end side. To. The heat of the hydraulic fluid is transmitted to the heat radiating fins 55 in the heat radiating portion 53, and the cooled hydraulic fluid is condensed and liquefied, and returns to the heat receiving portion 52 again by a capillary phenomenon or the like. As described above, the heat of the main body 11 is radiated to the outside by the latent heat transfer accompanying the repeated evaporation or condensation of the hydraulic fluid.

  In the heat radiating body 50, the heat radiating fins 55 are arranged to face each other in parallel, and the heat radiating portions 53 of the heat pipes 51 pass through the heat radiating fins 55, respectively. Here, of the peripheral edges of the heat radiating fins 55, the edges of the long sides 55a facing in the same direction are fixed in a concave-convex shape alternately arranged with respect to the reference plane. Accordingly, the heat radiating fins 55 do not interfere with each other so as to warm each other over the entire area, and at least at one end edge arranged in the uneven shape, the heat radiating fins facing each other with the one heat radiating fin 55 interposed therebetween. A space with a large width can be secured between 55 and heat dissipation efficiency can be improved.

  In particular, since the heat radiating fins 55 are all rectangular pieces having the same size, it is not necessary to prepare a plurality of types of heat radiating fins having different sizes, and the components of each unit constituting the heat radiating body 50 are common. Can be Furthermore, the plurality of units are arranged so as to be distributed over the entire area of the back surface side of the main body 11, and it is possible to prevent occurrence of a location where heat is not locally radiated or uneven distribution of the heat dissipation.

  As shown in FIG. 10, among the units that are the radiators 50, two units arranged one above the other with the terminal block unit 14 interposed therebetween are opposed to each other vertically, and the radiation fins in each unit The gap between 55 forms a ventilation space continuous in the vertical direction. Thereby, when the heated air rises between the heat radiating fins 55, the flow is continuously heated from the lower heat radiating body 50 to the upper heat radiating body 50 without being interrupted or staying in the middle. The air can flow smoothly, and the heat dissipation efficiency can be further improved.

  Moreover, in each unit of the heat radiating body 50, as shown in FIG. 16, the heat radiating portions 53 of the respective heat pipes 51 are located at different positions at different distances from the back surface side of the main body 11 with respect to the respective radiating fins 55. It is fixed in a staggered pattern. Thereby, not only the heat radiating fins 55 but also the interference between the heat pipes 51 can be avoided as much as possible, and the heat radiation efficiency can be further enhanced.

  Further, the main body 11 provided with the light source 20 and the heat radiating body 50 has a frame structure that supports the overall structure of the lighting device 10. Accordingly, it is not necessary to separately prepare a housing for housing the LED 20 and the like, and components such as the lens 30 and the globe 40 can be directly attached to the main body 11. Therefore, it is possible to suppress an increase in weight due to the increase in capacity of the entire lighting device 10, and it is possible to easily perform assembly work and installation work.

  FIGS. 17-19 has shown the temperature distribution of the thermal analysis which confirmed the thermal radiation efficiency about this illuminating device 10 which arranged the edge of each said thermal radiation fin 55 alternately. On the other hand, FIG. 20 to FIG. 22 show the temperature distribution of the thermal analysis for confirming the heat radiation efficiency for the conventional lighting device in which the edges of the heat radiation fins 55 are aligned and arranged. FIG. 23 is a bar graph comparing the results of the maximum temperature in the present lighting device 10 and the above-described conventional lighting device.

  17 to 22, it is shown that the darker the darker the higher the temperature on the surface of the main body 11 (only one half is shown), and the lower the lighter the darker the higher the heat dissipation efficiency. As can be seen by comparing the results of FIGS. 17 to 19 with the results of FIGS. 20 to 22, the maximum temperature of the present lighting device 10 is kept lower than that of the conventional lighting device, and the heat dissipation efficiency is clearly improved. It can be confirmed that it is expensive. As shown in FIG. 23, the maximum temperature in the present lighting device 10 is 90.7 ° C., whereas the maximum temperature in the conventional lighting device is 92.7 ° C., which is an obvious temperature difference between the two. Can be seen. This indicates that the lighting device 10 has high heat dissipation efficiency.

  As described above, the embodiments of the present invention have been described with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the present invention can be modified or added without departing from the scope of the present invention. Included in the invention. For example, although the projector has been described as an example of the lighting device 10, it may be applied to various other lighting devices. Moreover, although the shape in front view of the illuminating device 10 is a substantially hexagon, you may comprise other shapes and sizes, for example, an octagon, a circle, or a square.

  Moreover, although the said heat radiating body 50 is comprised as a unit of the same magnitude | size shape altogether, you may make it prepare the unit from which a magnitude | size and a shape differ, and arrange these by a predetermined | prescribed layout. Moreover, the heat pipe 51 of the heat radiating body 50 uses the heat pipes 51A and 51B of the same length, or prepares two types of heat pipes of different lengths and arranges them alternately. Also good. However, in any case, the length of the intermediate portion 54 is set to be different.

  This is because heat interferes if the length of the intermediate portion 54 is the same. In addition, if the length of the intermediate portion 54 is the same, the positions where the heat pipe 51 penetrates the heat radiating portion 53 are aligned, so that the positions penetrating the heat radiating portion 53 are arranged in a staggered manner. This is because the structural strength becomes weak. Here, for example, if the heat dissipating portions 53 are aligned, the heat dissipating fins 55 may be wobbled around the portion. Further, different types of heat pipes having different heat radiation efficiency may be prepared depending on the difference in the working fluid inside the heat pipe 51, and these may be mixed.

  Further, with respect to the heat radiating fins 55 of the heat radiating body 50, the respective short sides 55b are fixed at different positions in the height direction in the state where only the upper and lower long sides 55a are adjacent to each other while being aligned with the reference surfaces at both ends. However, for example, the upper and lower long sides 55a may be aligned and the left and right short sides 55b may be alternately arranged, or both the long sides 55a and the short sides 55b may be alternately shifted. . Furthermore, when the radiation fins 55 are arranged with different sizes and shapes of the radiation fins 55, they may be fixed so that the respective edges are not aligned.

  The illuminating device according to the present invention can be used for a wide range of applications such as outdoor stadiums, lighting of building exteriors, signboard lighting, parking lots, exhibition halls, factory work spots, and the like.

DESCRIPTION OF SYMBOLS 10 ... Illuminating device 11 ... Main body 12 ... Printed wiring board 13 ... Round hole 14 ... Terminal block unit 14a ... Strut member 20 ... LED
DESCRIPTION OF SYMBOLS 30 ... Lens 31 ... Convex lens part 40 ... Globe 50 ... Radiator 51 ... Heat pipe 51A ... Heat pipe 51B ... Heat pipe 52 ... Heat receiving part 53 ... Radiation part 54 ... Middle part 55 ... Radiation fin 55a ... Long side 55b ... Short side 70 ... Arm mounting part 71 ... Arm 72 ... Base 73 ... Hinge part

Claims (5)

In a lighting device comprising: a main body on which a light source is mounted; and a radiator provided on the back side opposite to the front side on which the light source is mounted on the main body,
The heat radiator comprises a combination of a plurality of heat pipes that absorb heat received by the main body from the light source, and a plurality of heat radiation fins that are connected in a state where each heat pipe penetrates to release heat.
Each of the heat pipes has a heat receiving part on one end side connected to the back side of the main body, and a heat radiating part on the other end side extends away from the back side of the main body,
Each of the heat dissipating fins is arranged in a state of facing each other in parallel, the heat dissipating part of each of the heat pipes penetrates through each other, and at least one end edge of each heat dissipating fin facing in the same direction Each of the lighting devices is fixed in an uneven shape that is alternately arranged with respect to the reference plane.   Each of the heat dissipating fins is formed in a rectangular shape having the same size, and is arranged in a state where the long side and the short side that are paired are aligned in the same direction, and the edges of the long side and / or the short side are The illumination device according to claim 1, wherein each of the illumination devices is fixed in an uneven shape that is alternately arranged with respect to the reference surface.   The heat radiating portion of each heat pipe is fixed to each heat radiating fin by penetrating in a staggered arrangement at different positions from the back side of the main body. 2. The illumination device according to 2.   The heat radiator comprises a block-like unit in which the heat pipes and the heat radiation fins are fixed to each other in advance, and a plurality of units are provided on the back side of the main body. Item 4. The lighting device according to item 1, 2 or 3.   5. The unit according to claim 4, wherein at least any two of the units are vertically opposed to each other on the back side of the main body, and a ventilation space is formed in which a gap between the heat radiating fins is continuous in the vertical direction. Lighting device.