JP2012238568A - Lighting device and air-blower unit for lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device having excellent cooling efficiency and a long life, in which a cooling fan is not downsized and heat does not conduct directly on a shaft of a cooling fan motor.SOLUTION: The bulb-shaped LED lamp 100 is provided with an LED 121, a heat sink 130 having fins 133, 134, a case 110 having an opening on a heat sink 130 side, an air intake port 131 formed on a part of an outer circumferential side of the heat sink 130 or the case 110, an exhaust port 132 formed on a part of the outer circumferential side other than the part of the outer circumferential side where the air intake port 131 is formed, on the heat sink 130 or the case 110, an air-blower 130 arranged between the heat sink 130 and the case 110, and a partitioning plate 135 partitioning between a first space including the intake port 131 and a second space including the exhaust port 132. In the second space, there is provided the fin 134 having a lower height than the fin 133 formed in the first space.

Description

  The present invention relates to an illumination device including an air blower and an air blower unit for an illumination device.

  In recent years, various types of LED (Light Emitting Diode) bulbs have been developed as lighting devices that can replace incandescent bulbs. Since these LED bulbs use a plurality of LEDs, they generate a large amount of heat. For this reason, there is a strong demand for efficiently dissipating heat generated by the LEDs.

  Patent Document 1 describes an LED bulb that improves heat dissipation efficiency by attaching a cooling fan inside the LED bulb and forcibly radiating heat.

  However, the LED light bulb described in Patent Document 1 requires a space for storing the lighting circuit, the motor for the fan, and the drive circuit for the motor when the air-cooled fan is mounted inside. Not suitable for.

  Patent Document 2 describes a light bulb-shaped amplifier that uses an LED as a light emitter and can cope with downsizing while ensuring cooling efficiency. A light bulb shaped lamp described in Patent Document 2 includes a substrate having a light emitting element on one main surface, a heat radiator having one end side in close contact with the other main surface of the substrate, and a housing portion inside, and a housing portion for the heat radiator. The air-cooling means housed in the housing, the globe covering the substrate and attached to one end of the radiator, the base provided on the other end of the radiator, and the radiator and the base are housed between the light-emitting element And a drive circuit that is provided on the substrate and drives the air cooling means.

  FIG. 1 is an external view of a light bulb shaped lamp described in Patent Document 2. FIG.

  As shown in FIG. 1, the light bulb shaped lamp 10 includes a globe 11 made of glass having light diffusibility formed in a substantially spherical shape, a main body case 12, and a base 13.

  The main body case 12 has an intake port 14 formed on the entire periphery and an exhaust port 15 formed on the entire periphery above the intake port 14. Inside the main body case 12, a heat radiating body for radiating heat from the LED substrate portion and an air cooling means (both not shown) for cooling the heat radiating body by a fan are housed.

  The air inlet 14 takes in outside air into the main body case 12 by air cooling means (not shown). The intake port 14 is formed in a long hole shape along the axial direction of the main body case 12, and is formed at substantially equal intervals in the circumferential direction of the main body case 12.

  The exhaust port 15 exhausts the air taken into the main body case 12 to the outside. The exhaust ports 15 are formed at substantially equal intervals in the circumferential direction of the main body case 12.

  As shown in FIG. 1, the light bulb shaped lamp 10 has an intake port 14 and an exhaust port 15 provided around the main body case 12 in a ring shape in the vertical direction.

  With the above configuration, the light bulb shaped lamp 10 takes outside air from the intake port 14 below the main body case 12 in a substantially horizontal direction, changes the wind direction upward in the main body case 12, and then from the exhaust port 15 above the main body case 12. Exhaust in a substantially horizontal direction. For this reason, in the light bulb shaped lamp 10, although the intake and exhaust positions differ in the height direction, the intake port 14 and the exhaust port 15 are close to each other.

JP 2007-265892 A JP 2010-108774 A

  However, the light bulb shaped lamp described in Patent Document 2 has the drawback that warm air exhausted from the exhaust port 15 is sucked from the intake port 14 because the intake port 14 and the exhaust port 15 are arranged close to each other. is there. For this reason, there exists a subject which the heat dissipation effect of a fan will fall.

  An object of the present invention is to provide an illuminating device that can be arranged to be separated from an intake port and an exhaust port to divide intake and exhaust air, can always inhale cold air and can be used for cooling, and can enhance the heat dissipation effect of the fan It is providing the ventilation unit for lighting devices.

  An illuminating device of the present invention includes an LED, a fin, a heat sink that dissipates heat of the LED, a case having an opening on the heat sink side, and an air intake formed on the heat sink or a part of the outer peripheral side of the case An exhaust port formed on a part of the outer peripheral side different from the part of the outer peripheral side of the heat sink or the case where the air inlet is formed, and exhausts air that hits the heat sink; and the heat sink And an air blower that blows air sucked through the air intake port toward the heat sink, a first space including the air intake port, and a second space including the exhaust port. And a partition plate for partitioning, wherein the fin having a shorter height than the fin formed in the first space is provided in the second space.

  The blower unit for lighting device according to the present invention is different from the heat sink that dissipates the heat of the LED, the air inlet formed in a part of the outer peripheral side of the heat sink, and the part of the outer peripheral side where the air inlet is formed. An exhaust port that is formed on a part of the other outer peripheral side of the heat sink and exhausts air that hits the heat sink; and a blower that is provided in the heat sink and blows air sucked through the intake port toward the heat sink. A partition plate that partitions the first space including the intake port and the second space including the exhaust port, wherein the fin is shorter than the fin formed in the first space in the second space. Adopting the configuration.

  According to the present invention, by separating intake and exhaust in the left-right direction, cold air can always be sucked and used for cooling, and the heat dissipation effect of the fan can be enhanced.

External view of conventional bulb-type lamp External view of lighting apparatus according to Embodiment 1 of the present invention The perspective view of the illuminating device which concerns on the said Embodiment 1. FIG. The exploded perspective view of the illuminating device which concerns on the said Embodiment 1. FIG. The exploded perspective view of the illuminating device which concerns on the said Embodiment 1. FIG. The top view which shows the detailed structure of the heat sink of the illuminating device which concerns on the said Embodiment 1. FIG. The perspective view which shows the detailed structure of the heat sink of the illuminating device which concerns on the said Embodiment 1. FIG. The perspective view which shows the detailed structure of the heat sink of the illuminating device which concerns on the said Embodiment 1. FIG. The bottom view which shows the detailed structure of the heat sink of the illuminating device which concerns on the said Embodiment 1. FIG. Sectional drawing of the heat sink with which the air blower of the illuminating device which concerns on the said Embodiment 1 was mounted. Sectional drawing explaining the flow of the wind of the illuminating device which concerns on the said Embodiment 1. FIG. The perspective view explaining the flow of the wind of the illuminating device which concerns on the said Embodiment 1. FIG. The top view which shows the structure of the other partition type of the air blower of the illuminating device which concerns on the said Embodiment 1. FIG. The perspective view which shows the structure of the other partition type of the air blower of the illuminating device which concerns on the said Embodiment 1. FIG. Top view of lighting apparatus according to Embodiment 2 of the present invention. Sectional drawing of the illuminating device which concerns on the said Embodiment 2. FIG. Sectional drawing which shows the detailed structure of the illuminating device which concerns on the said Embodiment 2. FIG. The perspective view which shows the detailed structure of the illuminating device which concerns on the said Embodiment 2. FIG. The top view which shows the detailed structure of the heat sink of the illuminating device which concerns on the said Embodiment 2. FIG. The perspective view which shows the detailed structure of the heat sink of the illuminating device which concerns on the said Embodiment 2. FIG. The perspective view which shows the detailed structure of the heat sink of the illuminating device which concerns on the said Embodiment 2. FIG. The perspective view which removed the sheet metal cover from FIG. Sectional drawing explaining the flow of the wind of the illuminating device which concerns on the said Embodiment 2. FIG.

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

(Embodiment 1)
2 and 3 are external views of the illumination device according to Embodiment 1 of the present invention. FIG. 2 is a front view thereof, and FIG. 3 is a perspective view seen from below. 4 and 5 are exploded perspective views of the lighting device. 4 is a view seen from above, and FIG. 5 is a view seen from below.

  The present embodiment is an example applied to a bottom-side intake / exhaust LED lamp in which the direction of intake / exhaust is on the lower surface side.

  As shown in FIGS. 2 to 5, the LED lamp 100 has a case 110 having a base 110a and an opening 110b, an LED substrate 120 on which the LED 121 is mounted, a heat sink 130 for cooling the heat generated by the LED 121, and the heat sink 130. And a blowing device 140 for blowing air.

  The LED lamp 100 is attached below the heat sink 130, the power supply board 150 that supplies power to the LED board 120 and the blower 140, the connector 123 that connects the power supply of the power supply board 150 to the connector plug 122 of the LED board 120, and the heat sink 130. And an irradiation unit 160 having a lens 161 for diffusing light from the LED 121.

  The LED board 120, the heat sink 130, the air blower 140, the power supply board 150, and the irradiation unit 160 are screwed onto the screwing 110c on the inner wall of the case 110 through screws (160) through the screw holes 160a formed in the irradiation unit 160. It is tightened together.

  The case 110 is made of a member having good heat dissipation, such as an aluminum alloy. The case 110 is formed in a bowl shape that gradually expands in diameter from a rectangular parallelepiped base 110a on one end side to an opening 110b on the other end side.

  The LED substrate 120 mounts the LED 121 and is provided in contact with the heat sink 130. The LED substrate 120 is a metal base substrate formed of a metal material such as aluminum having good heat dissipation or an insulating material, for example. The LED substrate 120 is in contact with the heat sink 130 to dissipate heat.

  The heat sink 130 has an outer peripheral portion 130a attached to the opening 110b of the case 110 with the same diameter, and contacts the LED substrate 120 to cool the LED 121. In addition to the basic function of cooling the heat generated by the LED 121 by contacting the LED substrate 120, the heat sink 130 arranges the blower 140 at a position shifted from the center of the heat sink 130 (eccentric position), and sucks air into the blower 140. The air inlet 131, the air blower 140, and the air outlet 132 are arranged on substantially the same plane along the heat sink 130. Details of the heat sink 130 will be described later with reference to FIGS.

  The blower 140 cools the heat sink 130 by causing an air flow through the heat sink 130. The blower 140 is placed in the case 110 and on the heat sink 130 and blows air toward the heat sink 130. More specifically, the air blower 140 has an exhaust surface opposite to the exhaust surface facing the heat sink 130 and an intake surface provided on the opposite surface, and air sucked through the intake port 131 is transferred from the exhaust surface to the heat sink 130. Blow toward. Details of the blower 140 will be described later with reference to FIG.

  The power supply board 150 supplies DC power to the LED board 120 and the blower 140 via the connector 123.

  The irradiation unit 160 is attached below the heat sink 130 with the same diameter as the outer peripheral portion 130 a of the heat sink 130. The irradiation unit 160 includes a flat spherical lens 161 made of light-diffusing glass or synthetic resin. The lens 161 covers the light emitting surface of the LED 121 and diffuses the light from the LED 121.

  6 to 9 are diagrams showing a detailed configuration of the heat sink 130. 6 is a top view thereof, FIG. 7 is a perspective view thereof, FIG. 8 is a perspective view of the sheet metal cover removed from FIG. 7, and FIG. 9 is a bottom view thereof.

  As shown in FIGS. 6 to 9, the heat sink 130 accommodates an outer peripheral portion 130a having the same diameter as the opening 110b of the case 110, a flange portion 130b protruding outward from the outer peripheral portion 130a, and a circular LED substrate 120. A cylindrical portion 130c (FIG. 9).

  The heat sink 130 has the air blower 140 disposed at a position shifted from the center of the heat sink 130 (eccentric position), an air inlet 131 that sucks air into the air blower 140, and an air outlet 132 that discharges the wind that hits the heat sink 130. Are provided on the same plane. The intake port 131 and the exhaust port 132 are formed on the lower surface of the heat sink 130.

  The heat sink 130 and the air blower 140 are both circular when viewed from above, and the heat sink 130 has a larger diameter. Since the air blower 140 is placed within the outer diameter of the heat sink 130, a circular space is formed on the outer periphery of the air blower 140. An intake port 131 is formed on one side of the semicircular side, and an exhaust port 132 is formed on the other side. Since the intake port 131 and the exhaust port 132 are formed on both sides of the blower 140 placed on the heat sink 130, that is, on both semicircular sides of the heat sink 130, both are arranged on the same plane.

  Furthermore, in the present embodiment, the air blower 140 is disposed at a position (eccentric position) shifted from the center of the heat sink 130, the semicircular side having a large space is the intake port 131, and the semicircular side having a small space is the intake port. 132. The heat sink 130 on the inlet 131 side is formed with a large (here, tall) radiating fin 133, and the heat sink 130 on the inlet 132 is formed with a small (here, short) radiating fin 134.

  The heat sink 130 has a partition plate 135 that changes the flow of the sucked air between the air inlet 131 and the air blowing device 140 and allows the air to flow into the air blowing device 140. The partition plate 135 is a partition that covers the air inlet 131 side of the blower 140 in a substantially semicircular shape along the shape of the blower 140. The partition plate 135 partitions the first space including the intake port 131 and the intake surface of the blower 140 from the second space including the exhaust port 132, the exhaust surface of the blower 140 and the heat sink 130. The air sucked by the blower 140 strikes the partition plate 135 and the flow direction is changed, and flows into the intake port inside the sheet metal cover 147 above the blower 140.

  On the upper part of the partition plate 135, a sheet metal cover 147 that covers the outer periphery of the upper part of the air blowing device 140 and increases the air blowing efficiency is attached. The sheet metal cover 147 is an air inlet to the blower 140 and regulates the air flow.

  In the heat sink 130, a hole 136 for passing the connector 123 is opened on the lower surface of the inlet 131 side below the partition plate 135. As shown in FIG. 9, the heat sink 130 has a screw hole 137 and a hole 138 for adjusting the blower 140 after the blower 140 is attached on the lower surface. Further, the heat sink 130 has the air conditioning protrusions 139 concentrically formed on the mounting surface of the blower 140.

  FIG. 10 is a cross-sectional view of the heat sink 130 on which the blower 140 is placed. 10 is a cross-sectional view taken along arrow AA in FIG.

  As shown in FIG. 10, the blower 140 includes a shaft 141, a bearing 142, a fan blade 143 attached to the end of the shaft 141, a stator 144, and an annular magnet 145 attached inside the fan blade 143. And are configured as a unit.

  The shaft 141, the bearing 142, the stator 144, and the annular magnet 145 constitute a motor 146 as a whole. A sheet metal cover 147 is attached to the upper part of the blower 140.

  The shaft 141 is rotatably supported by the bearing 142 and rotates the fan blade 143. The rotation of the fan blade 143 is driven by the stator 144 and the annular magnet 145.

  The stator 144 is formed by laminating metal plates made of a magnetic material in the axial direction of the rotation shaft. An insulating layer is formed on each tooth portion of the stator 144 by electrodeposition coating or the like, and a coil is wound through the insulating layer. A magnetic field is generated by passing a current through the coil, and the stator 144 is driven by being attracted and repelled by the magnet 145.

  The structure of the motor 146 is not limited to the above structure, and any structure may be used as long as it can drive the blower 140.

  Hereinafter, the operation of the lighting apparatus configured as described above will be described.

  11 and 12 are diagrams for explaining the flow of wind in the lighting device according to the embodiment of the present invention. FIG. 11 is a sectional view thereof, and FIG. 12 is a perspective view thereof. For convenience of explanation, the motor 146 portion is omitted. 11 and 12, solid line arrows indicate the flow of wind.

  As shown in FIGS. 11 and 12, the heat sink 130 has the air blower 140 disposed at a position (eccentric position) shifted from the center of the heat sink 130, and includes an intake port 131 and an exhaust port 132 on the same plane. The semicircular side where the space is wide is the intake port 131, and the semicircular side where the space is narrow is the intake port 132.

  In a state where the outer peripheral portion 130 a of the heat sink 130 is attached to the opening 110 b of the case 110, the intake port 131 is disposed on one semicircular side of the substantially circular case 110 and the exhaust port 132 is disposed on the other semicircular side. . That is, the intake port 131 and the exhaust port 132 are disposed on the same plane and on different side surfaces of the case 110.

  In addition, a partition plate 135 that partitions the intake port 131 side and the exhaust port 132 side is disposed in the case 110. In the present embodiment, a partition plate 135 is formed between the air inlet 131 on the heat sink 130 and the air blowing device 140. Of the two regions partitioned by the partition plate 135, the side on which the fan blade 143 is disposed outward is the exhaust port 132 side. The intake / exhaust directions include bottom intake / exhaust and side intake / exhaust, and this embodiment is an example of bottom intake / exhaust.

  Here, in order to improve the blowing efficiency of the blower 140, it is necessary to surround the fan blade 143 in order to regulate the direction of the wind. By installing the partition plate 135 and the sheet metal cover 147, the air blowing efficiency is increased.

  As shown in FIGS. 11 and 12, when the air blower 140 operates, the wind is sucked from the air inlet 131 on the lower surface of the heat sink 130, hits the partition plate 135, and reaches the upper portion of the air blower 140 along the side surface of the partition plate 135. . Then, it passes through the sheet metal cover 147 and is drawn into the blower 140 from above and is discharged from the exhaust port 132 on the lower surface of the heat sink 130.

  Thus, in this embodiment, since intake and exhaust are separated in the left-right direction (not the up-down direction), cold air can always be sucked and used for cooling. That is, in the conventional example, since the intake and exhaust are divided in the vertical direction, the intake and exhaust ports are close to each other, and the heat dissipation effect of the fan is reduced. On the other hand, in the present embodiment, as shown in FIGS. 11 and 12, the intake port 131 and the exhaust port 132 are arranged at the farthest structural positions, that is, the lower surfaces of the left and right end positions of the opening 110 b of the case 110. As a result, cold air can always be sucked and used for cooling, and the heat dissipation effect of the fan can be greatly enhanced.

  In addition, the present embodiment and the conventional example have the following differences in the shape of the region where each of the intake and exhaust ports is formed.

  In the conventional example, the width in the axial direction of the fan is small, it is an annular shape (a shape that is long and narrow when viewed in plan), and the resistance of the passing wind is large. On the other hand, in the present embodiment, the intake port 131 and the exhaust port 132 are semicircular and have a shape closer to a square than the conventional example when viewed in plan. For this reason, the resistance of the passing wind is reduced, and the blowing efficiency can be improved.

  Further, in the conventional example, when the distance between the intake port and the exhaust port is to be increased, it is necessary to make the openings of the intake port and the exhaust port small and relatively away from each other. In the present embodiment, there is no such structural limitation, the openings of the intake port 131 and the exhaust port 132 can be formed larger, and the blowing efficiency can be further improved.

  Furthermore, as shown in FIGS. 11 and 12, the wind in the case 110 basically flows in the left-right direction, and there is no excessive change of direction. Since the degree of wind direction change is gradual, the resistance to wind is small and the blowing efficiency can be increased.

  In addition to the above features, the present embodiment further has the following features.

  In the structure in which the blower 140 is disposed on the upper surface of the heat sink 130 and the LED substrate 120 on the lower surface of the heat sink 130 is dissipated, a connector 123 for connecting the LED substrate 120 and the power supply substrate 150 and a region for arranging the wiring are necessary.

  In the present embodiment, the air blower 140 is arranged so as to be shifted from the center of the heat sink 130, whereby the intake port 131 side is formed wider than the exhaust port 132 side. An area for arranging the connector 123 and the wiring is secured on the side of the widely formed inlet 131. Specifically, a hole 136 for passing the connector 123 is opened on the lower surface below the partition plate 135 on the intake port 131 side. Since the wind speed at the exhaust port 132 side is higher than that at the intake port 131 side, if the hole 136 is formed on the exhaust port 132 side, the wind is likely to leak. In the present embodiment, the air inlet 131 side is formed wider than the air outlet 132 side, and the holes 136 are opened to prevent wind leakage and to arrange the connector 123 and wiring on the air inlet 131 side where the wind speed is low. By doing so, try not to disturb the flow of wind as much as possible.

  Further, in the present embodiment, since the exhaust port 132 and the fan blade 143 are overlapped, the propelled wind is exhausted linearly from the exhaust port 132, and intake / exhaust efficiency can be improved.

  In the present embodiment, the partition plate 135 is formed on the heat sink 130. Since the partition plate 135 is a part of the heat sink 130, the heat conduction is good and the heat dissipation effect can be improved.

  In the present embodiment, a partition plate 135 is formed on the intake port 131 side. In the vicinity of the exhaust port 132, there is nothing that blocks the flow of wind, so the efficiency of intake and exhaust can be improved. Moreover, the freedom degree of arrangement | positioning of the air blower 140 is high.

  In the present embodiment, the fin 133 on the intake port 131 side is formed larger (higher) than the fin 134 on the exhaust port 132 side. For the following reasons. Since the wind speed on the exhaust port 132 side is faster than that on the intake port 131 side, the fins are obstructed on the exhaust port 132 side and the wind speed is likely to drop. On the other hand, the intake port 131 side sucks air uniformly in the entire intake port 131, so that the fins are less likely to become wind resistance, and the fins can be formed larger. Note that if the fins are formed large or many, the heat dissipation effect of the heat sink 130 can be enhanced.

  The partition plate 135 is preferably extended above the upper end of the air blower 140 in order to prevent wind from flowing backward from the exhaust side to the intake side. The size of the exhaust port 132 and the intake port 131 may be approximately the same. In addition, the larger the size of the exhaust port 132 and the intake port 131, the better.

  Although it is not impossible to dispose the blower 140 on the intake port 131 side, there are the following demerits.

  Since the wind immediately after passing through the blower 140 has a high speed, it has a strong inertia and wants to go straight ahead. Therefore, there is a demand to go straight ahead and exhaust. When the air blower 140 is disposed on the intake port 131 side, the wind must once change the direction to the exhaust port 132 side after hitting the case 110. Great resistance to wind.

13 and 14 are diagrams showing the configuration of another partition type of the blower 140. FIG. FIG.
Is a top view thereof, and FIG. 14 is a perspective view thereof.

  The partition type includes a box fan type and a heat sink integrated type.

  The heat sink integrated type in which the partition plate 135 is formed on the heat sink 130 has been described.

  As shown in FIGS. 13 and 14, the box fan type is provided with an annular partition plate 148 that surrounds the outer periphery of the blower 140 instead of the partition plate 135. In the box fan type, since the annular partition plate 148 surrounds the outer periphery of the blower device 140, the rectifying effect is high, but the fan blowing efficiency is high.

  As described above in detail, the LED lamp 100 of the present embodiment includes a case 110 having a substantially circular opening 110b, an LED substrate 120 on which the LED 121 is mounted, a heat sink 130 that cools the heat generated by the LED 121, A blower 140 that blows air toward the heat sink 130. The heat sink 130 has the air blower 140 disposed at a position shifted from the center of the heat sink 130 (eccentric position), an air inlet 131 that sucks air into the air blower 140, and an air outlet 132 that discharges the wind that hits the heat sink 130. Are provided on the same plane. That is, by arranging the intake port 131 on one semicircular side of the substantially circular case 110 and the exhaust port 132 on the other semicircular side, the intake port 131 and the exhaust port 132 are in the same plane of the case 110. Located on the top and on different sides.

  With the above configuration, the wind is sucked from the air inlet 131 on the lower surface of the heat sink 130, hits the partition plate 135, and reaches the upper portion of the blower 140 along the side surface of the partition plate 135. Then, it passes through the sheet metal cover 147 and is drawn into the blower 140 from above and is discharged from the exhaust port 132 on the lower surface of the heat sink 130.

  Thus, since intake and exhaust are divided in the left-right direction (not the up-down direction), cold air can always be taken in and used for cooling, and the heat dissipation effect of the fan can be greatly enhanced.

(Embodiment 2)
15 and 16 are external views of the illumination device according to Embodiment 2 of the present invention. FIG. 15 is a top view thereof, and FIG. 16 is a sectional view thereof. The same components as those in FIG. 2 are denoted by the same reference numerals, and description of overlapping portions is omitted. For convenience of explanation, the LED substrate 120, the power supply substrate 150, the connector 123, and the irradiation unit 160 are omitted. The blower 140 is shown in a simplified manner.

  The present embodiment is an example applied to a side intake / exhaust LED lamp in which the direction of intake / exhaust is on the side surface side.

  As shown in FIGS. 15 and 16, the LED lamp 200 includes a case 210 having a base 210a and an opening 210b, a heat sink 230 that cools the heat generated by the LED, and a blower device 140 that blows air toward the heat sink 230. Prepare.

  The case 210 is formed in a bowl shape that gradually increases in diameter from a rectangular parallelepiped base 210a on one end side to an opening 210b on the other end side. Case 210 has screwing 210c on the inner wall.

The case 210 includes an air inlet 231 that sucks air into the blower 140 and a heat sink 23.
An exhaust port 232 for discharging the wind hitting 0 is provided on the same plane. The intake port 231 and the exhaust port 232 are formed on the left and right side surfaces of the case 210. At least a part of the exhaust port 232 is formed to be positioned below the upper end of the blower 140 to which the sheet metal cover 247 is attached. Details of the case 210 will be described later with reference to FIGS. 17 and 18.

  The heat sink 230 includes an outer peripheral portion 230a having the same diameter as the opening 210b of the case 210, a flange portion 230b protruding outward from the outer peripheral portion 230a, a cylindrical portion 230c that accommodates the circular LED substrate 120 (not shown), Have

  The heat sink 230 is attached to the opening 210 b of the case 210 with the outer peripheral portion 230 a having the same diameter. The heat sink 230 arranges the air blowing device 140 at a position (eccentric position) shifted from the center of the heat sink 230.

  The heat sink 230 and the blower 140 are both circular when viewed from above, and the heat sink 230 has a larger diameter. Since the air blower 140 is placed within the outer diameter of the heat sink 230, a circular space is formed on the outer periphery of the air blower 140. An intake port 231 is formed in one case 210 on the semicircular side, and an exhaust port 232 is formed in the other case 210. The intake port 231 and the exhaust port 232 are formed on both sides of the air blower 140 placed on the heat sink 230, that is, on both semicircular sides of the heat sink 230, so that they are aligned on the same plane.

  17 and 18 are diagrams showing a detailed configuration of the LED lamp 200. FIG. FIG. 17 is a sectional view thereof, and FIG. 18 is a perspective view thereof.

  As shown in FIGS. 17 and 18, the air blower 140 is arranged at a position (eccentric position) shifted from the center of the heat sink 230, and the inside of the case 210 on the semicircular side having a large space is used as the air inlet 231, so that the space is narrow. The inside of the case 210 on the semicircular side is an intake port 232.

  The heat sink 230 includes a partition plate 235 that changes the flow of the sucked air and flows into the blower 140 between the air inlet 231 and the blower 140. The partition plate 235 is a partition that covers the air inlet 231 side of the blower 140 in a substantially semicircular shape along the shape of the blower 140. The air sucked by the air blower 140 strikes the partition plate 235, changes its flow, and flows into the air inlet inside the sheet metal cover 247 above the air blower 140.

  On the upper part of the partition plate 235, a sheet metal cover 247 that covers the upper outer periphery of the air blower 140 and increases the air blowing efficiency is attached. The sheet metal cover 247 is an air inlet to the blower 140 and adjusts the air flow.

  19 and 20 are diagrams illustrating a detailed configuration of the heat sink 230. FIG. 19 is a top view thereof, and FIG. 20 is a perspective view thereof.

  As shown in FIGS. 19 and 20, many heat radiation fins 233 are formed on the heat sink 230 on the intake port 231 side, and fewer heat radiation fins 334 are formed on the heat sink 230 on the air intake port 232 side.

  In the heat sink 230, a hole 236 for allowing the connector 123 (not shown) to pass therethrough is opened on the lower surface below the partition plate 235 on the intake port 231 side. As for the heat sink 230, the screw hole 237 is formed on the lower surface, and the air conditioning protrusion 239 is formed concentrically on the mounting surface of the blower 140.

21 and 22 are diagrams showing a detailed configuration of the heat sink 230. FIG. FIG. 21 is a perspective view thereof, and FIG. 22 is a perspective view in which a sheet metal cover is removed from FIG. For convenience of explanation, the heat radiation fins 333 of the intake port 231 are omitted.

  As shown in FIGS. 21 and 22, the heat sink 230 and the blower 140 are both circular when viewed from above, and the heat sink 230 has a larger diameter. The air blower 140 is disposed at a position (eccentric position) shifted from the center of the heat sink 230, and the inside of the case 210 on the semicircular side with a large space is used as the air inlet 231 and the inside of the case 210 on the semicircular side with a small space is formed on the air intake 232.

  The heat sink 230 includes a partition plate 235 that changes the flow of the sucked air and flows into the blower 140 between the air inlet 231 and the blower 140. The air sucked by the air blower 140 strikes the partition plate 235, changes its flow, and flows into the air inlet inside the sheet metal cover 247 above the air blower 140.

  21 and 22, the partition plate 235 formed on the heat sink 230 can support the sheet metal cover 247, and the sheet metal cover 247 can support the fan blade 143. This configuration has an advantage that the air blower 140 can be easily assembled. Moreover, since heat is not directly transmitted to the shaft 141 of the blower 140, the motor is less deteriorated and the life can be extended.

  Note that the fan of the fan blade 143 of the blower 140 may be upside down.

  Hereinafter, the operation of the lighting apparatus configured as described above will be described.

  FIG. 23 is a cross-sectional view illustrating the wind flow of the lighting device according to the embodiment of the present invention. In FIG. 23, solid arrows indicate the flow of wind.

  As shown in FIG. 23, when the air blower 140 operates, the wind is sucked from the air inlet 231 formed on one side surface of the case 210, hits the partition plate 135, and reaches the upper part of the air blower 140. Then, the air is drawn into the blower 140 from the sheet metal cover 247 and discharged from an exhaust port 232 formed on one side surface of the case 210.

  As described above, in the present embodiment, intake and exhaust are divided in the left-right direction (not the up-down direction), so that cold air can always be sucked and used for cooling. In other words, the air inlet 231 and the air outlet 232 are arranged at positions farthest from the left and right side surfaces of the case 210, so that cold air can always be taken in and used for cooling, and the heat dissipation effect of the fan can be increased. It can be significantly improved.

  Moreover, the opening of the inlet port 231 and the exhaust port 232 can be formed large, and the blowing efficiency can be further improved.

  Further, the wind in the case 210 basically flows in the left-right direction, and there is no excessive change of direction. Since the degree of wind direction change is gradual, the resistance to wind is small and the blowing efficiency can be increased.

  In the present embodiment, the partition plate 235 is formed on the heat sink 230. Since the partition plate 135 is a part of the heat sink 230, the heat conduction is good and the heat dissipation effect can be improved.

In the present embodiment, a partition plate 235 is formed on the intake port 231 side. Exhaust port 23
In the vicinity of 2, there is nothing that blocks the flow of wind, so the efficiency of intake and exhaust can be improved. Moreover, the freedom degree of arrangement | positioning of the air blower 140 is high.

  In the present embodiment, the fins 233 on the intake port 231 side are formed larger (higher) than the fins 234 on the exhaust port 232 side. For the following reasons. Since the wind speed on the exhaust port 232 side is higher than that on the intake port 231 side, the fins are obstructed on the exhaust port 232 side and the wind speed is likely to drop. On the other hand, the intake port 231 side sucks air uniformly in the entire intake port 231, so that the fin is less likely to become wind resistance, and the fin can be formed larger. Note that if the fins are formed larger or more, the heat dissipation effect of the heat sink 230 can be enhanced.

  In the present embodiment, as shown by the broken line in FIG. 17, at least the exhaust port 232 is formed at the same height as or below the blower 140. The air inlet 231 is preferably formed above the air blower 140, but this need not be the case.

  The partition plate 235 preferably extends above the upper end of the blower 140 in order to prevent wind from flowing backward from the exhaust side to the intake side. The sizes of the exhaust port 232 and the intake port 231 may be approximately the same. In addition, the larger the size of the exhaust port 232 and the intake port 231, the better.

  Although it is not impossible to dispose the blower 140 on the intake port 231 side, there are the following demerits.

  Since the wind has a strong centrifugal force, it is difficult to suck air from the side of the fin. Therefore, as in the present embodiment, wind is once applied to the partition to change the direction, and air is sucked from above the blower 140 and propelled to the exhaust side.

  Even in the present embodiment, as in the first embodiment, the air blower 140 may be configured as a box fan type. In the box fan type, since the annular partition plate surrounds the outer periphery of the blower 140, the rectifying effect is high, and the fan blowing efficiency is high.

  The above description is an illustration of a preferred embodiment of the present invention, and the scope of the present invention is not limited to this.

  In each said embodiment, although the name of the air blower and the illuminating device was used, this is for convenience of explanation, and an air blower etc. may be sufficient.

  Furthermore, each component which comprises the said air blower and an illuminating device, for example, the kind of case, a board | substrate, etc., is not restricted to embodiment mentioned above.

  The illuminating device and the illuminating device blower unit of the present invention are suitable for use in a light bulb-shaped LED lamp including a blower that cools the LED mounting substrate.

100, 200 LED lamp 110b, 210b Opening 120 LED substrate 121 LED
123 Connector 130, 230 Heat sink 131, 231 Air inlet 132, 232 Air outlet 135, 235 Partition plate 140 Air blower 147, 247 Sheet metal cover 150 Power supply board 160 Irradiation unit 161 Lens

Claims (4)

LED,
A heat sink comprising fins and dissipating the heat of the LED;
A case having an opening on the heat sink side;
An air inlet formed on a part of the outer periphery of the heat sink or the case;
An exhaust port for exhausting air hitting the heat sink, formed on the outer peripheral side part different from the outer peripheral side part where the air inlet is formed in the heat sink or the case;
A blower that is provided between the heat sink and the case, and blows air sucked through the intake port toward the heat sink;
A partition plate that partitions the first space including the intake port and the second space including the exhaust port;
With
The lighting device, wherein the fins shorter than the fins formed in the first space are provided in the second space.   The lighting device according to claim 1, wherein a center of the blower is arranged to be shifted to the exhaust port side from a center of the heat sink.   The lighting device according to claim 1, wherein the partition plate partitions the intake port and the blower device. A heat sink that dissipates the heat of the LED;
An air inlet formed in a part of the outer peripheral side of the heat sink;
An exhaust port that is formed on another part of the outer peripheral side of the heat sink that is different from the part of the outer peripheral side where the intake port is formed, and exhausts air that has hit the heat sink,
A blower provided in the heat sink, for blowing the air taken in through the intake port toward the heat sink;
A partition plate that partitions the first space including the intake port and the second space including the exhaust port;
With
The illuminating device blower unit, wherein the second space is provided with fins shorter than the fins formed in the first space.