JP2015144045A - Luminaire - Google Patents

Abstract

Provided is an illuminating device capable of quickly releasing heat generated from a light source with a simple configuration and reliably preventing overheating of the light source without causing an increase in weight or cost.
A heat radiating body is provided on the back surface side of a main body on which a light source is mounted. The heat radiating body includes a plurality of heat pipes and a plurality of heat radiating fins through which the heat pipes penetrate. Combining. Each heat pipe 51 has a heat receiving part 52 on one end side connected to the back side of the main body 11, a heat radiating part 53 on the other end side is separated from the back side of the main body 11, and the heat radiating part 53 is perpendicular to the heat receiving part 52. It is arrange | positioned so that it may extend to a high position.
[Selection] Figure 1

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).

  In general, a heat pipe is filled with a working fluid (for example, pure water or hydrofluorocarbon) under reduced pressure, and the working fluid heated on one end side evaporates and vaporizes, then moves to the other end and cools down. Then, it condenses and liquefies, and returns to the one end side again by gravity or capillary action. Thus, heat can be transported by moving the working liquid repeatedly evaporating or condensing. Therefore, a fine groove or a sintered metal body is provided on the inner wall of the heat pipe as a structure for returning the working fluid condensed on the other end side to the one end side by capillary action.

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

  In the conventional heat dissipation unit described above, the groove type with fine grooves as the capillary structure of the heat pipe is cheaper than the sintered type with a sintered metal body, and there are many choices of length, manufacturing cost. However, on the other hand, heat transport performance (that is, heat dissipation efficiency) was inferior to that of the sintered type. Regardless of which type of heat pipe is used, it is necessary to increase the heat radiation efficiency of the heat pipe in order to meet the demand for larger capacity accompanying the adoption of LEDs in recent projectors.

  However, in the groove type, if there is a case where the groove type extends downward from a place where it is attached to the projector according to the installation state of the projector, the heat radiation efficiency cannot be sufficiently exhibited. Therefore, in order to meet the demand for a large capacity projector, there is no choice but to adopt a sintered type instead of a groove type. Compared with the groove type, this sintered type has a problem that it is difficult to obtain a product having a long length, and the cost is high, resulting in a cost increase.

  In view of such circumstances, it is conceivable to use as few sintered types as possible, but in order to respond to the increase in the capacity of the projector, instead of reducing the number of heat pipes, the heat radiation fins can be increased. , You have to increase that number. Accordingly, there arises a new problem that the cost of the heat radiation fin is increased and an unacceptable weight increase is also caused.

  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 enables a sufficient heat dissipation efficiency to be exhibited even with a groove type heat pipe, resulting in an increase in weight and cost. Without overheating the light source without fail, the proper brightness and life of the light source can be maintained, and the increase in weight due to the increase in capacity can be suppressed, simplifying assembly and installation work. An object of the present invention is to provide a lighting device that can be performed.

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 radiator (50) has at least a heat pipe (51) that absorbs heat received by the main body (11) from the light source (20),
The heat pipe (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). The heat dissipating part (53) is arranged to extend to a higher position in the vertical direction than the heat receiving part (52) in a normal installation state of the main body (11). A lighting device (10).

  [2] The lighting device (10) according to the above [1], wherein the heat pipe (51) includes a capillary structure in which a thin groove is cut in an inner wall thereof.

[3] The heat pipe (51) is formed in a substantially U shape, the heat receiving part (52) which is a straight part on one end side, the heat radiation part (53) which is a straight part on the other end side, A curved intermediate portion (54) connecting between the heat receiving portion (52) and the heat radiating portion (53) is integrally connected,
The heat pipe (51) is connected to the back side of the main body (11) with the heat receiving portion (52) extending in a horizontal direction in a normal installation state of the main body (11), and the heat receiving portion ( The intermediate part (54) is arranged so as to incline at an upward angle with respect to a horizontal plane from the base end of 52), and the heat radiating part (53) is from the heat receiving part (52) from the base end to the tip. The lighting device (10) according to [1] or [2], wherein the lighting device (10) is arranged to extend in parallel with the heat receiving portion (52) at a high position in the vertical direction.

[4] The heat radiating body (50) is a combination of the plurality of heat pipes (51) and a plurality of heat radiating fins (55) connected to each heat pipe (51) so as to release heat. And
The heat dissipating fins (55) are arranged in parallel and facing each other, and the heat dissipating portions (53) of the heat pipes (51) are fixed to penetrate each other. The illumination device (10) according to [1], [2] or [3].

  [5] The heat dissipating portions (53) of the heat pipes (51) are arranged in a staggered manner at positions where the distances from the back side of the main body (11) are staggered with respect to the heat dissipating fins (55). The lighting device (10) according to [4], wherein the lighting device (10) is fixed through.

  [6] The heat radiating body (50) forms a block-like unit in which the heat pipes (51) and the heat radiating fins (55) are fixed to each other in advance, and the back surface of the main body (11) The lighting device (10) according to [4] or [5] above, wherein a plurality of units are provided on the side.

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), a working fluid (for example, pure water or hydrofluorocarbon) is sealed under reduced pressure, and the working fluid heated in the heat receiving portion (52) on one end side is evaporated and vaporized, and the like. It moves to the end side and reaches the heat radiating part (53). The working fluid is cooled and condensed in the heat radiating section (53) to be liquefied and returned to the heat receiving section (52) again by gravity or capillary action, but the working liquid is repeatedly evaporated and condensed to move to the main body. The heat of (11) is radiated to the outside.

  Here, for the heat dissipation efficiency of the heat pipe (51), the flow rate at which the condensed hydraulic fluid returns from the heat dissipation portion (53) to the heat receiving portion (52) is important regardless of the groove type or the sintered type described above. If the capillary force exceeds the limit, heat transport stops. In the case of the sintered type, since the capillary force is relatively high, there is not much problem. However, in the present invention, the heat radiating portion (53) of the heat pipe (51) receives heat in the normal installation state of the main body (11). By arranging to extend to a higher position in the vertical direction than the part (52), it is possible to urge the return of the working liquid to the heat receiving part (52) positively by gravity without relying only on the capillary force.

  Therefore, in order to cope with the increase in the amount of heat generated due to the increase in capacity of the lighting device (10), it is possible to sufficiently transport heat even if a groove type is used without using an expensive sintered type having a low degree of design freedom. The limit can be improved. As a result, as described in [2] above, even if the heat pipe (51) is a groove type including a capillary structure in which a thin groove is cut in the inner wall, it is possible to exhibit sufficient heat dissipation efficiency. Thus, it is possible to reliably prevent overheating of the light source (20) without causing an increase in weight or an increase in cost and to maintain an appropriate brightness and life of the light source (20).

  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 [3], the heat pipe (51) is formed in a substantially U shape, and the heat receiving part (52) which is a linear part on one end side and the linear part on the other end side. The heat dissipating part (53) and the curved intermediate part (54) connecting the heat receiving part (52) and the heat dissipating part (53) are integrally formed. And in the normal installation condition of the main body (11), the heat receiving part (52) is connected to the back side of the main body (11) in a state of extending in the horizontal direction, and is intermediate from the base end of the heat receiving part (52). (54) is arranged so as to be inclined at an upward angle with respect to the horizontal plane, and the heat dissipating part (53) is located at a position higher in the vertical direction than the heat receiving part (52) from the base end to the front end. It arrange | positions so that it may extend in parallel with a heat receiving part (52).

  With such a configuration or arrangement, the movement of the hydraulic fluid in the heat radiating portion (53) depends on the capillary force, but from the base end of the heat radiating portion (53) to the base end of the heat receiving portion (52). The hydraulic fluid can be smoothly moved by gravity due to the inclination of the intermediate portion (54). Therefore, even if it is a groove type heat pipe (51), it becomes possible to ensure sufficient heat dissipation efficiency.

  According to the illuminating device (10) described in [4], the radiator (50) includes not only the plurality of heat pipes (51) but also the plurality of radiation fins (55). 55) are arranged in parallel and facing each other, and the heat dissipating portions (53) of the respective heat pipes (51) are penetrated and fixed respectively. As a result, the heat of the hydraulic fluid is transmitted to the heat radiating fins (55) at the heat radiating portion (53) of each heat pipe (51), and the contact area with the air is also increased by the surface area of each heat radiating fin (55). It can spread and further improve the heat dissipation efficiency.

  According to the illuminating device (10) described in [5] 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, the distance between each adjacent heat pipe (51) becomes large, it can avoid interfering so that it may warm mutually, and heat dissipation efficiency can be improved further.

  According to the illuminating device (10) described in [6] above, the heat radiating body (50) forms a block-like unit in which the heat pipes (51) and the heat radiating 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 lighting device according to the present invention, it is possible to exhibit sufficient heat radiation efficiency even with a groove type heat pipe instead of a sintered type, and reliably prevent overheating of the light source without causing an increase in weight or an increase in cost. Thus, it is possible to maintain the appropriate brightness and life of the light source.
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 a top view which shows the illuminating device which concerns on embodiment of this invention. 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 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 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 perspective view which shows the back surface side of the main body which has arrange | positioned the heat pipe 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 pipe of the illuminating device which concerns on embodiment of this invention. It is a rear view which shows the main body which has arrange | positioned the heat pipe 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 pipe of the illuminating device which concerns on embodiment of this invention.

Hereinafter, an embodiment representing the present invention will be described with reference to the drawings.
1 to 16 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. FIG. 5 is a plan view showing the illumination device 10. 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 the frame structure of the lighting device 10, and is formed in a substantially octagonal 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 the present embodiment, the printed wiring board 12 is combined in a manner 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. The plurality of LEDs 20 are arranged so as to be sequentially arranged in a concentric octagonal shape from the center of the main body 11 toward 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 special case, and is attached in a state of being separated from the back surface of the main body 11 via a support member 14a. 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.

  In FIG. 6, the lens 30 directs the irradiation light from each LED 20 forward, and is disposed in a state of covering the immediate front of each LED 20. 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 eight 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 an octagonal 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 side view of the main body 11 in which the radiator 50 is arranged, FIG. 11 is a rear view of the main body 11 in which the radiator 50 is arranged, and FIG. 12 is a plan view of the main body 11 in which the radiator 50 is arranged.

  13 is a perspective view showing the back side of the main body 11 on which the heat pipe 51 is arranged, and FIG. 14 is a side view showing the back side of the main body 11 on which the heat pipe 51 is arranged. 15 is a rear view showing the back side of the main body 11 on which the heat pipe 51 is arranged, and FIG. 16 is a plan view showing the main body 11 on which the heat pipe 51 is arranged.

  As shown in FIGS. 8 to 12, the heat radiating body 50 is connected to a plurality of heat pipes 51 that absorb heat received by the 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. In the present embodiment, the heat radiating body 50 includes two types of heat radiating bodies 50A and 50B, strictly speaking, due to slight differences in the configuration of the heat pipe 51 and the heat radiating fins 55.

  As shown in FIGS. 8 and 5, the heat radiating body 50 </ b> A having the larger overall length is arranged on the center side of the main body 11 so as to face the left and right of the center. On the other hand, the heat sink 50B having the smaller overall length is arranged so that a pair of the heat sinks 50B are arranged in parallel on the outside of the heat radiator 50A. Thus, a total of four units of the radiator 50 are arranged on the back side of the main body 11 so as to surround the terminal block unit 14. 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 heat pipe 51 constituting the larger radiator 50A is composed of two types of heat pipes 51A and 51B having different sizes. Similarly, the heat pipe 51 constituting the smaller radiator 50B is composed of two types of heat pipes 51A and 51B having different lengths. Hereinafter, when the two types of heat pipes 51 </ b> A and 51 </ b> B are also collectively referred to, they are simply referred to as the heat pipe 51.

  Each 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 heat receiving portion 52 and a heat radiating portion 53 in a substantially U shape in FIG. The curved intermediate part 54 which connects between them is integrally connected. 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. On the inner wall of the heat pipe 51, a fine groove (groove) is cut as a capillary structure that causes the working fluid condensed in the heat radiating portion 53 to flow back to the heat receiving portion 52 by a capillary phenomenon. That is, the heat pipe 51 in the present embodiment employs a relatively inexpensive groove type, not an expensive sintered type.

  As shown in FIGS. 13 to 16, the heat pipes 51 are arranged in parallel with each other at equal intervals. In particular, in the larger radiator 50 </ b> A and the smaller radiator 50 </ b> B, the shorter heat pipe 51 </ b> A and the longer heat pipe 51 </ b> A respectively. The heat pipes 51B are arranged alternately. These heat pipes 51 are fixed in combination with radiating fins 55 described later. That is, the heat radiator 50 is configured as a block-shaped unit.

  Here, the heat receiving portions 52 of the respective heat pipes 51 are arranged so as to be arranged on the same plane in a state of extending in the horizontal direction, and the respective heat receiving portions 52 are screwed to the back side of the main body 11. , Caulking, welding or the like. 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.

  Moreover, the intermediate part 54 extended from the base end of the said heat receiving part 52 is distribute | arranged so that it may incline at an upward angle with respect to a horizontal surface by side view (refer FIG.6, FIG.10, FIG.14). Thereby, the heat radiating part 53 of each heat pipe 51 is extended to the state separated from the back surface side of the main body 11 via the intermediate part 54, respectively. In particular, the heat radiating part 53 extends from the base end to the tip. It is disposed so as to extend in parallel with the heat receiving portion 52 at a position higher in the vertical direction than the portion 52. Each heat radiating portion 53 is fixed so as to penetrate through the heat radiating fins 55 described below.

  Further, as shown in FIG. 10, in the larger heat radiating body 50A and the smaller heat radiating body 50B, the height position of each heat radiating portion 53 is shorter than the intermediate portion 54 in the short heat pipe 51A. 11, the distance from the back side of the main body 11 is short and low, and in the long heat pipe 51 </ b> B, the distance from the back side of the main body 11 is long and high because the middle part 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 thin metal plate made of metal such as copper or aluminum having high thermal conductivity, and is formed in a shape having a different size for each unit. All of the 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 through therethrough. As shown in FIG. 8, in the larger heat radiating body 50A, the largest shape of the heat radiating fins 55A1 extending in the longitudinal direction is the largest. Two radiating fins 55A2 having a half shape are arranged side by side, and two radiating fins 55A3 having a shape smaller than that of the radiating fin 55A2 are also arranged side by side on the other end side.

  In the smaller radiator 50B, the radiating fins 55B having the same size are arranged in parallel and facing each other. Hereinafter, when radiating fins 55A1, 55A2, 55A3, and 55B are collectively referred to, they are simply referred to as radiating fins 55. In any of the heat radiating bodies 50, the heat radiating fins 55 are arranged in a state in which the peripheral edges are aligned with the reference plane.For example, at least one end edge facing the same direction among the peripheral edges of the heat radiating fins 55, You may fix to the uneven | corrugated shape lined up alternately with respect to each reference plane.

  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. On the upper end side of the arm 71, the hinge portion 73 pivotally supported by the arm mounting portion 70 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 gravity or capillary action. 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.

  The heat radiation efficiency of such a heat pipe 51 is important because the flow rate of the working fluid condensed in the heat radiating section 53 is returned to the heat receiving section 52. In particular, in the case of the groove type described above, fine grooves (grooves) provided on the inner wall are formed. Limited by capillary force. However, in the present lighting device 10, in the normal installation state of the main body 11, the heat radiating portion 53 of the heat pipe 51 is disposed so as to extend higher in the vertical direction than the heat receiving portion 52 (FIG. 6, FIG. 6). 10, refer to FIG. 14), it is possible to urge the return of the working fluid to the heat receiving portion 52 positively by gravity without relying only on the capillary force.

  Therefore, in order to cope with the increase in the amount of heat generated due to the increase in capacity of the lighting device 10, it is possible to sufficiently limit the heat transport even if the groove type is used without using an expensive sintered type having a low degree of design freedom. Can be improved. Thereby, it is possible to exhibit sufficient heat dissipation efficiency while suppressing the cost of the heat radiating body 50, reliably preventing overheating of the light source 20 without causing an increase in weight and an increase in cost, and achieving an appropriate brightness of the light source 20. The sheath life can be maintained. In the present embodiment, the normal installation state is an angle of the main body 11 in which the irradiation direction of the lighting device 10 is horizontal, but the range in which the heat radiating unit 53 is higher than the heat receiving unit 52 in the vertical direction. The angle can then be adjusted.

  Moreover, in the smaller heat radiating body 50B, as shown in FIG. 10, the heat radiating portions 53 of the respective heat pipes 51 are located at different positions with respect to the respective radiating fins 55 from the back surface side of the main body 11 alternately. It is fixed in a zigzag array. Thereby, the distance between each adjacent heat pipe 51 becomes large, it can avoid interfering so that it may mutually warm up as much as possible, and can further improve heat dissipation efficiency.

  In addition, the plurality of units of the heat radiating body 50 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 radiated locally or biasing of the heat radiating location. Furthermore, if the edges of the long side or the short side facing the same direction among the peripheral edges of the heat radiating fins 55 are fixed in the uneven shape arranged alternately with respect to the reference plane, the heat radiating fins 55 are all respectively There is no interference so as to warm each other over the area, and at least at one end edge arranged in the uneven shape, a large width space is secured between the radiation fins 55 facing each other with one radiation fin 55 in between, Heat dissipation efficiency can be increased.

  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.

  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 octagon, you may comprise other shapes and sizes, for example, a hexagon, a circle, or a square.

  Further, in the smaller heat radiating body 50B, two types of heat pipes 51A and 51B having different lengths are prepared and arranged alternately at different positions in a staggered arrangement. Only a part of them may be arranged in a staggered arrangement, or even in the larger radiator 50A, some or all of the heat pipes 51 may be arranged in a staggered arrangement at different positions. good.

  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 50A ... Radiator 50B ... Radiator 51 ... Heat pipe 51A ... Heat pipe 51B ... Heat pipe 52 ... Heat receiving part 53 ... Radiation part 54 ... Intermediate part 55 ... Radiation fin 55A1 ... radiation fins 55A2 ... radiation fins 55A3 ... radiation fins 55B ... radiation fins 70 ... arm mounting portions 71 ... arms 72 ... pedestals 73 ... hinge portions

Claims (6)

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 radiator has at least a heat pipe that absorbs heat received by the main body from the light source,
The heat pipe has a heat receiving portion on one end connected to the back side of the main body, and a heat radiating portion on the other end extends away from the back side of the main body. The illuminating device, wherein the heat radiating portion is arranged to extend to a position higher in the vertical direction than the heat receiving portion.   The lighting device according to claim 1, wherein the heat pipe includes a capillary structure in which a thin groove is cut in an inner wall thereof. The heat pipe is formed in a substantially U shape, and the heat receiving portion that is a straight portion on one end side, the heat radiating portion that is a straight portion on the other end side, and a curve that connects between the heat receiving portion and the heat radiating portion. The middle part that is
The heat pipe is connected to the back side of the main body with the heat receiving portion extending in a horizontal direction in a normal installation state of the main body, and the intermediate portion from the base end of the heat receiving portion to the horizontal plane The heat dissipating part is arranged so as to be inclined at an upward angle, and is disposed so as to extend in parallel with the heat receiving part at a position higher in the vertical direction than the heat receiving part from the base end to the tip end. The lighting device according to claim 1 or 2. The heat radiator is composed of a combination of a plurality of heat pipes and a plurality of heat radiation fins that are connected in a state where each heat pipe penetrates and releases heat.
4. The illumination according to claim 1, wherein the heat radiating fins are arranged in parallel and facing each other, and the heat radiating portions of the heat pipes are fixed to penetrate each other. apparatus.   5. The heat dissipating part of each heat pipe is fixed to each heat dissipating fin by penetrating in a staggered arrangement at different positions from the back side of the main body. The lighting device described.   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 6. The lighting device according to Item 4 or 5.

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