JP6019497B2 - LED lighting device - Google Patents

Description

  The present invention relates to an LED lighting device formed using an LED (light emitting diode).

  The LED light source is also characterized in that it has a long life compared to the light source of conventional lighting devices such as incandescent bulbs, fluorescent lamps, mercury lamps, metal halide lamps, and the like. In recent years, such LED light sources have attracted attention, and various LED illumination devices using LED light sources have been proposed (for example, see Patent Documents 1 to 4).

JP 2006-203778 A JP 2011-528924 A JP 2011-46675 A Special table 2012-502432 gazette

  However, since the amount of heat generated by the LED light source is large and the amount of heat generated by the power source of the LED light source is also large, the temperature of the LED light source itself and the power source rises due to this heat, and as a result, for example, the internal electronic devices deteriorate. And the life of the entire LED lighting device (LED lighting fixture) is reduced. In addition, the LED lighting device with a built-in power source often becomes unusable even when the power source fails or has reached the end of its life, and it is often necessary to replace the entire LED lighting device. It is a factor that causes a decline in

  The present invention has been made in order to solve the above-mentioned problems. The purpose of the present invention is to provide an LED illumination that can be reduced in weight as much as possible without being affected by a decrease in life due to the heat of the power supply even if the power supply is incorporated. To provide an apparatus.

  In order to achieve the above object, the present invention has the following configuration as means for solving the problems. That is, the first invention has a substrate in which a through hole is formed, and a cylindrical portion provided in a manner of penetrating the through hole of the substrate, and the cylindrical portion protrudes from both sides of the substrate. A plurality of LED light sources are disposed on one side of the substrate at intervals, and a heat sink for dissipating heat from the LED light sources on the substrate surface side opposite to the LED light source disposed surface. Is provided on the outer peripheral side of the cylindrical part, and the base end surface of the heat sink is thermally connected to the substrate to dissipate the heat of the LED light source, and the cylindrical part is one end in the cylinder axis direction. The side protrudes further forward than the tip of the heat sink, and a vent is formed in the side peripheral wall of the protruding cylindrical portion, and the other end side of the cylindrical portion in the cylindrical axis direction is provided with the LED light source of the substrate. Projecting forward from the surface, an opening is formed at the projecting tip. The power source of the LED light source can be stored in the cylinder of the cylindrical part, and air is introduced into the cylinder of the cylindrical part from the opening of the cylindrical part. When the temperature of the substrate rises due to the heat of the LED light source, the air that has entered the base end side of the heat sink from the outside of the heat sink is An air flow for cooling the power source and the LED light source are formed by the cylindrical portion and flows to the tip side of the heat sink along the outer wall surface side of the cylindrical portion and led out from the tip side. The cooling airflow is insulated from the cooling airflow as means for solving the problem.

The second invention is, from the addition to the configuration of the first invention, the tip portion where the opening of the tubular portion is formed LED light source disposition surface of the LED light source of the substrate is provided H / D is in the range of 0.1 to 0.5 when h is the protruding length from the LED light source arrangement surface and D is the outer diameter of the substrate, A transparent cover member formed from the projecting tip of the cylindrical portion to the peripheral edge of the substrate is provided in such a manner as to cover the LED light source arrangement surface with a space from the LED light source arrangement surface. To do.

  Further, the third invention is characterized in that, in addition to the configuration of the first or second invention, the cylindrical portion is formed of a resin member.

Further, the fourth invention, in addition to the configuration of the first or second or third invention, that the outer peripheral wall of the portion surrounded by the heat sink of the cylindrical portion is the heat insulating layer is provided Features.

Further, the fifth invention, the first, in addition to the configuration of the fourth any one invention of the tubular portion from the distal end portion of the opening of the tubular portion is formed to the tip portions of the heat sink An air passage is formed to allow air to pass along the outer peripheral side of the cylindrical portion in the cylinder axis direction of the cylindrical portion.

Further, the sixth invention, the said tubular portion is housed the power source of the LED light source, the housing outer wall of the power source, characterized in that the radiating fins are formed.

Furthermore, a seventh aspect of the present invention, in addition to the configuration of any one invention of the first to sixth, in the tubular portion is housed the power of the LED light source, the power source and the AC input cable A DC output cable is connected and pulled out from the casing of the power source, and a waterproof connector is connected to each end of the AC input cable and the DC output cable.

Furthermore, an eighth aspect of the present invention, in addition to the configuration of any one invention of the first to seventh, a portion corresponding to the through hole near the substrate in the cylindrical portion of the cylinder, of the cylindrical portion characterized in that forced cooling means for creating from the opening side to force the flow of air to the vent side.

  According to the present invention, the cylindrical portion is provided so as to protrude from both surfaces of the substrate in a manner of penetrating the through hole of the substrate in which the through hole is formed, and a plurality of LED light sources are provided on one surface of the substrate. Are arranged at intervals, and a heat sink for dissipating heat from the LED light source is provided on the outer peripheral side of the cylindrical portion on the substrate surface side opposite to the LED light source arrangement surface. And since the base end surface of the said heat sink is thermally connected to the said board | substrate, the heat from the said LED light source can be thermally radiated with a heat sink. Further, when the temperature of the substrate rises due to the heat of the LED light source, air enters from the outside of the heat sink to the proximal end side of the heat sink and flows to the distal end side of the heat sink along the outer wall surface side of the cylindrical portion. Thus, the heat from the LED light source can be dissipated by this air flow.

  On the other hand, since the cylindrical part is configured such that the power source of the LED light source can be accommodated in the cylinder, the power source can be accommodated in the LED lighting device as necessary. Further, the cylindrical part has one end side in the cylinder axial direction protruding forward from the tip of the heat sink, and a vent hole is formed in a side peripheral wall part of the protruding cylindrical part. The other end side in the cylinder axis direction protrudes ahead of the LED light source arrangement surface of the substrate, and an opening is formed at the protruding tip portion. For example, a power source is accommodated in the cylinder and the temperature of the power source rises. When the temperature of the air in the cylindrical portion of the cylinder rises due to the air, air is introduced into the cylinder of the cylindrical portion from the opening of the cylindrical portion, flows through the cylinder, and is led out from the vent hole. Thus, the power supply can be cooled by so-called natural convection cooling.

  Thus, in the present invention, when the temperature of the substrate on which the LED light source is disposed rises due to the heat of the LED light source, air enters the base end side of the heat sink from the outside of the heat sink, and the outer wall surface of the cylindrical portion The air flow for cooling the LED light source that flows to the tip side of the heat sink along the side and is led to the outside, and the air flow that cools the power source through the inside of the cylindrical part are depending on the cylindrical part. Insulated (separated), cooling of the LED light source by the air passing through the heat sink and cooling of the power source by the air passing through the inside of the cylindrical part are performed separately. The LED lighting device can be efficiently cooled, the long-term reliability of the LED lighting device can be secured, the life can be extended, and the LED light source can be efficiently cooled. Te, the LED light source, it is possible to supply more current, it is possible to increase the total luminous flux as a result LED lighting device.

  Further, in the present invention, when the temperature of the LED light source rises, it can be cooled by utilizing the air flow (natural convection due to heat distribution) generated by the rise of the temperature of the air in the arrangement region. Even if no forced cooling means such as a fan is provided in the cylindrical portion, if the temperature of the air in the cylindrical portion of the cylindrical portion rises due to, for example, an increase in the temperature of the stored power source as described above, Since air is introduced into the cylinder of the cylindrical part from the opening and the power supply is cooled by the flow of air (natural convection due to heat distribution), if the fan is not provided in this way, Power for cooling is unnecessary, and further, it is possible to prevent the weight of the LED lighting device from becoming heavy and to reduce the weight.

  Furthermore, according to the present invention, as described above, a heat sink for dissipating heat from the LED light source is provided on the outer peripheral side of the cylindrical part, and the power supply of the LED light source can be stored in the cylinder of the cylindrical part. Therefore, it is possible to make the power storage and its cooling configuration and the LED light source cooling configuration compact, and it is possible to reduce the weight of the heat sink by not providing a heat sink at the position where the cylindrical part is formed. A compact and lightweight LED lighting device can be realized.

  Furthermore, in the present invention, the tip portion where the opening of the cylindrical portion is formed protrudes from the LED light source arrangement surface of the substrate, and the protrusion length from the LED light source arrangement surface is h, and the outer diameter of the substrate H / D is in the range of 0.1 to 0.5, and the transparent cover member formed from the protruding tip of the cylindrical portion to the peripheral edge of the substrate is spaced from the LED light source arrangement surface. By providing the LED light source in a manner that covers the LED light source arrangement surface, the following effects can be obtained.

  That is, when the temperature of the air near the opening of the transparent cover member or the cylindrical part is increased by the heat from the LED light source, the temperature of the air introduced into the cylinder from the opening of the cylindrical part becomes high, as described above. Although the cooling efficiency of the power supply due to the air flowing in the cylinder will be reduced, the tip part where the opening of the cylindrical part is formed is projected from the LED light source arrangement surface of the substrate, and the transparent cover member is also provided with the LED light source By separating from the surface, an increase in the temperature of the air near the opening of the cylindrical portion can be prevented, and power supply cooling by the airflow can be performed efficiently.

  By setting h / D to be 0.1 or more when the protrusion length from the LED light source arrangement surface of the tip part where the opening of the cylindrical part is formed is h and the outer diameter of the substrate is D The temperature rise of the air in the vicinity of the opening of the cylindrical portion can be efficiently prevented, and h / D is set to 0.5 or less (that is, the protruding length is set to be equal to or less than the radius of the substrate). Can be made easy to design.

  Furthermore, by forming the cylindrical portion with a resin member, the LED lighting device can be further reduced in weight, and the heat conductivity of the resin is lower than that of metal or the like. Since the heat conduction to the side is not good, the air flow flowing through the heat sink along the outer wall surface side of the cylindrical part and the air flow flowing inside the cylindrical part can be further thermally separated, and the LED light source And cooling efficiency of the power supply can be improved. Further, unlike a glass or the like, a resin cylindrical portion has high mechanical strength and is easy to handle during transportation.

Further, by providing the heat insulating layer on the outer peripheral wall of the portion surrounded by the heat sink of the cylindrical portion, it is possible to prevent the heat conduction between the heat sink and the cylindrical portion side, the wall surface side of the outer cylindrical portion Accordingly, the airflow flowing through the heat sink along the airflow flowing inside the cylindrical portion can be further thermally separated, and the cooling efficiency of the LED light source and the power source can be improved.

  Furthermore, an air passage is formed to allow air to pass along the outer peripheral side of the cylindrical part from the tip part where the opening of the cylindrical part is formed to the tip part of the heat sink. As a result, the air passage can prevent heat conduction between the heat sink and the cylindrical part, so that the air flow flowing along the wall surface outside the cylindrical part and the air flow flowing inside the cylindrical part can be prevented. Since thermal separation and cooling can be performed, the cooling efficiency of the LED light source and the power source can be improved.

  Furthermore, by storing the power source of the LED light source in the cylindrical part, an LED lighting device with a built-in power source can be formed, and by providing a heat radiating fin on the outer wall of the casing of the power source, cooling of the power source can also be performed Therefore, the cooling effect of the power source can be further improved.

  Further, in a configuration in which the power source of the LED light source is housed in the cylindrical part, an AC input cable and a DC output cable are connected to the power source and pulled out from the casing of the power source, and each of the ends of the AC input cable and the DC output cable is waterproof. By connecting the connector, it is possible to easily connect the power source to the AC power source for the LED lighting device and the LED light source, for example, with a single touch by the waterproof connector.

  Furthermore, by providing a forced cooling means for forcibly generating an air flow from the opening side of the cylindrical part to the vent side in a part corresponding to the vicinity of the through hole of the substrate in the cylinder of the cylindrical part, The cooling efficiency of the power supply can be improved.

It is typical sectional drawing which shows one Example of the LED lighting apparatus which concerns on this invention. It is a side view of the LED lighting apparatus of an Example. It is a perspective view of the LED lighting apparatus of an Example. It is the figure which looked at the LED lighting apparatus of the Example from the bottom face side. It is an enlarged view of the A area | region of FIG. It is explanatory drawing of the heat sink provided in the LED lighting apparatus of an Example. It is a graph for demonstrating the effect by separating the cylindrical site | part opening formation edge part of an LED lighting apparatus from a board | substrate. It is sectional explanatory drawing which illustrates typically the airflow which arises in the LED lighting apparatus of an Example. It is a perspective view which shows the structure of the power supply provided in the LED lighting apparatus of an Example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 schematically shows a cross-sectional view of an embodiment of an LED lighting device according to the present invention. Further, FIG. 2 shows a side view of the LED lighting device of the first embodiment, FIG. 3 shows a perspective view seen from the arrow B side in FIG. 1, and FIG. 3 shows a view seen from the arrow C side in FIG. 4 and an enlarged view of the area A of FIG. 1 is shown in FIG.

  As shown in FIGS. 1, 4, and 5, the LED lighting device 1 of the first embodiment includes a donut-shaped disk-shaped substrate 3 in which a substantially circular through hole 2 is formed, and a through-hole of the substrate 3. And a cylindrical portion 4 provided in a manner penetrating the hole 2. The cylindrical part 4 has a cylindrical part 4a protruding from one side (the lower side of FIGS. 1 and 5) of the substrate 3 and a cylindrical part 4b protruding from the opposite side (the upper surface of FIGS. 1 and 5). And protrudes from both sides of the substrate 3. The cylindrical portion 4b is formed of a resin member such as polycarbonate, for example, and has characteristics such as light weight, mechanical strength, and difficulty in transferring heat. The power source 11 of the LED light source 6 can be stored in the cylinder of the cylindrical portion 4 (4b), and FIGS. 1 to 5 show a state where the power source 11 is stored.

  Further, one surface (the lower surface in FIGS. 1 and 5) of the substrate 3 forms an LED light source disposition surface 5, and the LED light source disposition surface 5 includes a plurality of surfaces as shown in FIG. The LED light sources 6 (for example, 99 pieces) are arranged to be interspersed at intervals. As shown in the figure, the LED light sources 6 are arranged at almost equal intervals or at equal intervals. However, the arrangement of the LED light sources 6 is not limited, and is appropriately set. Is set. A heat sink 8 for dissipating heat from the LED light source 6 is provided on the substrate surface 7 side opposite to the LED light source arrangement surface 5 so as to cover the outer periphery of the cylindrical portion 4b. The end face 26 (see FIG. 5) is thermally connected to the substrate 3 to dissipate heat from the LED light source 6.

  For example, as shown in FIG. 6, the heat sink 8 includes a donut-shaped disk-shaped bottom plate (heat receiving bottom plate) 23 having a through hole 22 in the center, and the center of the through hole 22 in a manner standing vertically to the bottom plate 23. And a plurality of plate-like fins (radiation fins) 24 provided on the bottom plate 23 at a distance from each other in the radial direction, with the lower surface of the bottom plate 23 being a base end surface 26 of the heat sink. It is made. In FIG. 6, the surface of the bottom plate 23 is hatched for easy understanding.

  The bottom plate 23 and the fin 24 are made of, for example, aluminum or an aluminum alloy, magnesium, a magnesium alloy, or a heat conductive resin. In this embodiment, the clad has a silicon layer formed on the surface of an aluminum plate. The bottom plate 23 has a thickness of 3 mm, and the fins 24 have a thickness of 0.5 mm. A resin cover member 32 as shown in FIGS. 1 to 5 is provided on the outer peripheral side of the heat sink 8, and a plurality of slits 31 are formed in the cover member 32 at intervals.

  Each of the plurality of fins 24 is formed with the cylinder axis direction (Z direction) of the cylindrical portion 4 as the extending direction and is disposed with a gap therebetween, and the slit 31 of the cover member 32 is formed at the position where the gap is formed. It is formed corresponding to. Each fin 24 is formed to have a narrower width from the bottom plate 23 toward the front end side, and is rounded at the front end side, and each fin 24 is shown in FIGS. 1, 5, and 6. In addition, a plurality of through-holes 25 are formed at intervals from each other in a region from the central part of the cylindrical part 4 in the cylinder axis direction to the tip part.

  As shown in FIGS. 1 to 3, the cylindrical part 4 b has one end side in the cylinder axis direction (Z-axis direction in the figure) protruding ahead of the tip of the heat sink 8, and the protruding cylindrical part 4 b side. A slit-like vent 9 is formed in the peripheral wall portion. In addition, the cylindrical portion 4b has a perfect circular shape in the cross-sectional shape (XY cross-sectional shape) of the cylindrical hole, but the cylindrical portion 4b has a portion where the vent hole 9 is formed at the tip side (FIG. 1, FIG. It has a region where the diameter continuously decreases toward the upper side of FIG. 2 and a region where the diameter gradually decreases, and the diameter of the tip is smaller than the diameter in the region where the heat sink 8 is disposed. A base 30 for attaching the LED lighting device 1 to the attachment location is formed at the tip of the cylindrical portion 4b.

  In the present embodiment, the base 30 is formed in a size defined in the JIS base E39, and the illumination device corresponding to the base 30 has a high power of 50 W or more (up to about 300 W depending on the performance of the LED light source). A wattage LED lighting device 1 can be formed.

  In addition, although the magnitude | size of the nozzle | cap | die 30, the magnitude | size of the LED lighting apparatus 1, etc. are not specifically limited, It sets suitably, Usually, the above-mentioned high-wattage LED lighting apparatus also becomes large. Therefore, when the metal cylindrical portion 4 is provided and formed, the weight of the LED lighting device becomes heavy, and there is a risk of falling due to an earthquake, or that one person cannot work alone during construction. It is assumed that On the other hand, in this embodiment, the cylindrical portion 4 is made of resin to reduce the weight, and such a problem does not occur. Further, the length of the cylindrical portion 4b corresponding to the power supply 11 to be stored can be formed to have a storage margin by the amount that the cylindrical portion 4b is lightweight.

  As shown in FIGS. 1 and 5, the cylindrical portion 4 a is provided so as to protrude from the LED light source arrangement surface 5 side of the substrate 3, and the protruding length is when the outer diameter of the substrate 3 is 250 mm. For example, it is about 70 mm, and the transparent cover member 12 is formed from the projecting tip portion (the other end side of the cylindrical portion 4 in the cylinder axis direction) to the peripheral edge of the substrate 3. The transparent cover member 12 is provided so as to cover the LED light source arrangement surface 5 with a space from the LED light source arrangement surface 5, and the cylindrical body 15 is integrated with the transparent cover member 12 inside the transparent cover member 12. Provided.

  In addition, the cylindrical part 4a is provided inside the cylindrical body 15 with a space from the cylindrical body 15, and the cylindrical part 4a and the cylindrical body 15 are connected via a connecting plate portion 27, so that the cylindrical part is provided. 4a, the cylindrical body 15, and the transparent cover member 12 are integrally formed. In addition, although the formation material of the cylindrical part 4a, the cylinder 15, and the transparent cover member 12 is not specifically limited, For example, it can form with resin, such as a polycarbonate. An opening 10 is formed at the protruding tip of the cylindrical portion 4a, and the diameter of the opening 10 and the cylindrical inner diameter of the cylindrical portion 4a are formed to be 30 mm or more (for example, 80 mm).

  As shown in FIG. 5, in this embodiment, an O-ring 33 as a seal member is provided at a contact portion between the lower surface (base end surface 26) of the bottom plate 23 of the heat sink 8 and the peripheral portion of the transparent cover member 12. In addition, an O-ring 34 that is a sealing member is provided at a contact portion between the bottom plate 23 of the heat sink 8 and the cylinder 15, and the LED light source 6 is covered with the transparent cover member 12 and the cylinder 15. It is formed in a liquid-tight and air-tight manner so that water does not enter.

  The cylindrical wall of the cylindrical portion 4a is formed to increase in thickness from the opening 10 side to the substrate 3 side. However, the contact portion side of the cylindrical portion 4a with the bottom plate 23 is connected to the contact portion side. A groove portion 35 having an opening is formed over the entire circumference of the cylindrical portion 4a so that the contact area between the cylindrical portion 4a and the bottom plate 23 of the heat sink 8 is reduced. It is comprised so that heat may not be easily transmitted to the site | part 4a side.

  In this embodiment, when the LED light source 6 is driven to generate heat and the temperature of the substrate 3 rises, heat is transferred from the substrate 3 to the bottom plate 23 of the heat sink 8 and further to the fins 24. Heat is dissipated. Further, when the temperature of the substrate 3 rises due to the heat of the LED light source 6, an ascending airflow is generated in the interval between the fins 24 of the heat sink 8, and as shown by an arrow A in FIG. A structure in which the air that has entered the end side (interval between the fins 24 on the base end side) flows to the distal end side of the heat sink 8 along the outer wall surface side of the cylindrical portion 4 and is led out from the distal end side to the outside. It is made. Since the through holes 25 are formed in the fins 24, air flows through the holes 25, and the air is more likely to flow through the heat sink 8.

  On the other hand, when the temperature of the air in the cylinder of the cylindrical part 4 rises due to the rise in the temperature of the power supply 11 housed in the cylindrical part 4, as shown by the arrow B in FIG. Ascending airflow is generated in the tube, and air having a temperature lower than that of the air in the cylinder is introduced from the outside into the cylinder of the cylindrical part 4 through the opening 10 of the cylindrical part 4. By being derived, the power source 11 is cooled. Thus, the most characteristic configuration of the present embodiment is that the air flow for cooling the power source 11 and the air flow for cooling the LED light source 6 are insulated by the cylindrical portion 4.

  Further, in this embodiment, as shown in FIG. 5, a heat insulating layer 13 is formed on the outer peripheral wall of the tubular portion 4b surrounded by the heat sink 8, and the heat insulating layer 13 is made of, for example, a plastic foam. Is formed to a thickness of about 2 to 4 mm. In this embodiment, by providing the heat insulating layer 13, the cooling air flow of the power source 11 and the cooling air flow of the LED light source 6 are further thermally insulated.

  Furthermore, in the present embodiment, as indicated by an arrow C in FIG. 8 along the outer peripheral side of the cylindrical portion 4 from the tip portion where the opening 10 of the cylindrical portion 4 is formed to the tip portion of the heat sink 8, An air passage 14 is formed to allow air to pass in the cylindrical axis direction of the cylindrical portion 4. As shown in FIG. 5, the air passage 14 has a cylindrical portion 4 b in the space between the air passage 14 a formed by the space between the cylindrical body 15 and the outer peripheral side of the tubular portion 4 a and the fin 24 of the heat sink 8. The air passage 14b through which air flows and the air passages 14a and 14b are connected to each other in the connecting plate portion 27 with a space between the fins 24 of the heat sink 8 so as to communicate with each other. It has a plurality of through holes 16 (see also FIG. 4).

  In the present embodiment, by forming the air passage 14 on the outer peripheral side of the cylindrical portion 4 in this manner, the cooling air flow of the power source 11 and the cooling air flow of the LED light source 6 are further insulated. The air flow through the air passage 14a is generated when the transparent cover member 12 is heated due to heat from the LED light source 6 and a temperature difference with the surrounding atmosphere is generated, and the air passage 14a. The width (the distance between the outer periphery of the cylindrical portion 4 and the inner wall of the cylindrical wall 15) is preferably 2 mm to 10 mm.

  Moreover, if the space | interval of the transparent cover member 12 and the board | substrate 3 is small and the protrusion length of the cylindrical part 4a which protrudes ahead from the board | substrate 3 of the transparent cover member 12 is short, the opening 10 of the cylindrical part 4a will be formed. In the configuration in which the LED light sources 6 are arranged on the substrate 3 at equal intervals or substantially equal intervals as in this embodiment, the temperature of the air in the vicinity of the tip portion is increased. The number of LED light sources 6 is increased and the amount of heat generated from the LED light sources 6 is also increased. For example, in this embodiment, the temperature of the air near the LED light source arrangement surface 5 exceeds 50 ° C. and reaches 70 ° C.

  Therefore, the present inventor preferably sets the value of h / D to 0.1 or more, where h is the protruding length of the cylindrical portion 4a from the LED light source arrangement surface 5 and the diameter of the substrate 3 is D. This was derived from the example in Table 1 and FIG. In addition, the result of Table 1 and the characteristic line of FIG. 7 are the distance (protrusion length h) from the LED light source arrangement surface 5 when the ambient temperature in which the LED lighting device is provided is 23 ° C. and the value of D is 280 mm. )), And when the distance is 30 mm, h / D = 0.107148 (that is, 0.1 or more), and the air temperature can be less than 50 ° C. . Even if the value of D is changed, the relationship between the value of h / D and the air temperature is assumed to be substantially the same.

  In addition, even if h / D is greater than 0.5, a difference in the effect of lowering the air temperature in the vicinity of the opening 10 of the cylindrical portion 4a is unlikely to occur, so the h / D range is 0.1 to 0.5. An appropriate value within the range is preferable. In this embodiment, as described above, the tip portion where the opening 10 of the cylindrical portion 4a is formed is separated from the LED light source arrangement surface 5 of the substrate 3 having a diameter of 250 mm by 70 mm or more, and h / D is set to 0.28. As shown in Table 1, when D is 280 mm, h is 60 mm, and h / D is 0.214286, the temperature in the vicinity of the opening 10 is the ambient temperature (here 23 ° C.) in which the LED lighting device is provided + 17 Since the temperature can be suppressed to not more than ° C., the temperature near the opening 10 can be further lowered. In correspondence with this, the transparent cover member 12 is also formed away from the LED light source arrangement surface 5, and the temperature of the LED light source arrangement surface 5 can be prevented from becoming high.

  Further, although not shown in FIGS. 1 to 5 and FIG. 8, in this embodiment, the power source 11 of the LED light source 6 housed in the cylindrical portion 4 has a housing as shown in FIG. A plurality of heat radiating fins 18 are formed on the outer wall portion of the body 17 at intervals. Since the radiation area (area in contact with air) can be increased by forming the radiation fins 18, and in the present embodiment, the radiation fins 18 are elongated in the cylinder axis direction (Z-axis direction) of the cylindrical portion 4 b, As shown by the arrow B in FIG. 8, the inside of the cylindrical portion 4b can be formed as a passage for air flowing toward the upper side of the figure, and the heat radiation efficiency can be further improved. By providing 18, the temperature of the power source 11 can be lowered by about 4 to 5 ° C. In addition, although the radiation fin 18 is formed in one surface of the housing | casing 17, you may form in two or more surfaces, and you may apply | coat a radiation coating to the radiation fin 18. FIG.

  Further, an AC input cable 19 and a DC output cable 20 are connected to the power supply 11 and pulled out from the casing 17 of the power supply 11. A waterproof connector 21 is provided at each end of the AC input cable 19 and the DC output cable 20. , 22 are connected (the AC input cable 19 and the waterproof connectors 21 and 22 are not shown in FIGS. 1 to 5 and 8).

  In addition, this invention is not limited to the said Example, Various aspects can be taken. For example, in the above-described embodiment, the heat insulating layer 13 is provided on the outer peripheral side of the cylindrical portion 4b corresponding to the position where the heat sink 8 is formed, but the heat insulating layer 13 can be omitted.

  Moreover, in the said Example, although the air passage 14 provided in the outer peripheral side of the cylindrical part 4 was formed of the air passage 14a, the through-hole 16, and the air passage 14b, when forming the air path 14b, for example, a cylindrical part Similarly to the configuration in which the cylindrical body 15 is provided on the outer peripheral side of 4a, the cylindrical body 4b is provided on the outer peripheral side of the cylindrical part 4 (4b) on the heat sink 8 side, and the cylindrical part 4b is spaced from the cylindrical part 4b. The space between the cylindrical portion 4b and the outer peripheral side may be used as the air passage 14b. Further, for example, the through-hole 16 is not limited to a circular shape, and may have another shape such as a polygonal shape. Furthermore, the air passage 14 can be omitted.

  Furthermore, in the said Example, although the cylinder hole of the cylindrical part 4 was made into perfect circle shape, it may be polygonal shape and is good also as other shapes. Further, the size of the hole is not particularly limited, and is appropriately set.

  Furthermore, in the said Example, although it was set as the structure which accommodates the power supply 11 in the cylinder hole of the cylindrical site | part 4, it is good also as an external attachment, without accommodating the power supply 11. FIG.

  Furthermore, in the said Example, although the shape of the baseplate 23 of the board | substrate 3 and the heat sink 8 was formed in the disk shape which has the circular through-holes 2 and 22 in the center part, the baseplate formed corresponding to the board | substrate 3 or the board | substrate 3 As long as the through hole is formed, the shape of 23 may be, for example, a square plate shape or other shapes.

  Further, in the above embodiment, the through holes 25 are formed in the fins 24 of the heat sink 8, but the holes 25 may be omitted.

  Further, for example, as shown by a broken line F in FIG. 8, in the cylinder of the cylindrical part 4, a vent 9 is formed from the opening 10 side of the cylindrical part 4 to a part corresponding to the vicinity of the through hole 2 of the substrate 2. Forcible cooling means such as a fan for forcibly generating the air flow to the side may be provided. In this case, the power supply of the fan F can be selected so that it can be used in common with the power supply 11 of the LED light source 6, and the cooling efficiency of the power supply 11 can be improved by providing the forced cooling means.

  In this way, in the configuration in which the forced cooling means such as the fan F is provided, the temperature means for detecting at least one of the temperature of the power supply 11 and the power supply casing 17, and the temperature detected by the temperature detection means are set in advance. There may be provided a control configuration for starting the operation of the forced cooling means when the forced cooling start temperature is exceeded. The forced cooling start temperature is determined based on the heat resistant temperature of an electronic component such as a capacitor provided in the power source 11, and is set to 80 ° C., for example. The presence of the forced cooling means such as the fan F does not hinder natural convection in the cylindrical portion 4 even when the forced cooling means is not operating, and the ventilation and LED in the cylindrical portion 4 are not disturbed. Since the heat radiation air flow of the heat sink 8 for cooling the light source is separated, it is necessary for the forced cooling even when the power source 11 is disposed in the cylindrical portion 4 and forced cooling is performed by a fan or the like. The power consumption can be made extremely small.

  Furthermore, you may provide the fixing | fixed part which fixes the touch stop of an illuminating device in the cover member 32 or heat sink 8 of an LED illuminating device.

  The LED lighting device of the present invention has a simple configuration, and even if it has a built-in power source, it does not easily affect the life of the power source due to its heat, and can be reduced in weight. Can also be used.

DESCRIPTION OF SYMBOLS 1 LED lighting apparatus 2 Through-hole 3 Substrate 4 (4a, 4b) Cylindrical part 5 LED light source arrangement surface 6 LED light source 7 Substrate surface 8 Heat sink 9 Vent 10 Open 11 Power supply 12 Transparent cover member 13 Heat insulation layer 14 Air passage 15 Cylindrical body 16 Through hole 23 Bottom plate 24 Fin

Claims (8)

  A substrate having a through-hole formed therein and a cylindrical portion provided in a form penetrating the through-hole of the substrate, the cylindrical portion protruding from both sides of the substrate, and a plurality of one side of the substrate are LED light sources are arranged at intervals, and a heat sink for radiating heat from the LED light sources is disposed on the outer peripheral side of the cylindrical portion on the substrate surface side opposite to the LED light source arrangement surface. The base end surface of the heat sink is thermally connected to the substrate to dissipate the heat of the LED light source, and the cylindrical portion has one end side in the cylinder axis direction than the front end portion of the heat sink. A vent hole is formed in a side wall portion of the protruding cylindrical portion protruding forward, and the other end side of the cylindrical portion in the cylindrical axis direction protrudes further forward than the LED light source arrangement surface of the substrate. An opening is formed in the protruding tip, and the cylindrical portion The power source of the LED light source can be stored in the cylinder of the tube, and air is introduced into the cylinder of the cylindrical part, flows in the cylinder, and is led out from the vent hole to cool the power source. When the temperature of the substrate rises due to the heat of the LED light source, the air that has entered the proximal end side of the heat sink from the outside of the heat sink extends along the outer wall surface side of the cylindrical portion and the distal end side of the heat sink The air flow for cooling the power source and the air flow for cooling the LED light source are insulated by the cylindrical portion. LED lighting device. The LED light source is provided to protrude from the LED light source installation surface disposed, length of projection from the LED light source arrangement surface of the tip portion in which the opening of the tubular portion is formed the substrate H / D is in the range of 0.1 to 0.5, where h is D and the outer diameter of the substrate is D, and the transparent formed from the protruding tip of the cylindrical portion to the peripheral edge of the substrate The LED lighting device according to claim 1, wherein a cover member is provided so as to cover the LED light source arrangement surface with a space from the LED light source arrangement surface. The LED lighting device according to claim 1, wherein the cylindrical portion is formed of a resin member. LED lighting apparatus according to claim 1 or claim 2 or claim 3, wherein the outer peripheral wall of the portion surrounded by the heat sink of the tubular portion is characterized in that the heat insulating layer is provided. Air passage formed to allow passage of air in the cylinder axis direction of the cylindrical portion along an outer periphery of the tubular portion from the distal end portion of the opening of the tubular portion is formed to the tip portions of the heat sink The LED lighting device according to claim 1, wherein the LED lighting device is provided. Any one of claims 1 to 5, characterized in that the said tubular portion wherein the LED and the power is accommodated in the light source, the housing outer wall of the power source are formed radiating fins LED illuminating device of description. The said tubular portion is housed the power of the LED light source is led from the housing of the power AC input cable and DC output cable is connected to the power source, the AC input cable and DC output The LED lighting device according to claim 1, wherein a waterproof connector is connected to each end of the cable. A portion corresponding to the through hole near the substrate in the cylindrical portion of the cylinder, forced cooling means for generating from the opening side of the tubular portion to force the flow of air to the vent side is provided The LED illumination device according to claim 1, wherein the LED illumination device is provided.

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