JP2013097882A - Lighting system and blowing unit for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting system, and a blowing unit for the same, capable of effectively utilizing flow of air to enhance radiation effects of a blowing device, by separating an intake port and an exhaust port to right and left of a lamp body, and suctioning cold air at all times by taking it in from below aslant and exhausting downward aslant.SOLUTION: The device is provided with an intake port 131 formed at an outer periphery side of a heat sink 130, an exhaust port 132 fitted at an opposite side of the intake port 131 in the outer periphery of the heat sink 130 for exhausting air hitting the heat sink 130, a blowing device 140 blowing air taken in through the intake port 131 toward a heat sink 130 side, a diaphragm 135 partitioning between first space including the intake port 131 and a second space including the exhaust port 132, the blowing device 140 and the heat sink 130. Outside air is taken in from the intake port 131 to the first space and is to be exhausted aslant from the second space through the exhaust port 132.

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 lamp that uses an LED as a light-emitting body 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 driving circuit that is provided on the substrate and drives the air cooling means.

  FIG. 9 is an external view of a light bulb shaped lamp described in Patent Document 2. FIG.

  As shown in FIG. 9, 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. 9, 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. Further, if the rotational speed of the fan is increased in order to increase the heat dissipation effect of the cooling means such as a fan, noise is increased, and warm air exhausted from the exhaust port 15 is sucked from the intake port 14. There is a problem that the disadvantages of the problem become even greater.

  The object of the present invention is to arrange the intake and exhaust openings apart from each other on the left and right sides of the lamp body to divide intake and exhaust air. Moreover, it is providing the illuminating device which can use the flow of air effectively, and can improve the thermal radiation effect of an air blower, and the air blower unit for illuminators.

  The illuminating device of the present invention is formed on an LED, a heat sink that is provided above the LED, dissipates the heat of the LED, a case that is provided above the heat sink and has an opening on the heat sink side, and an outer peripheral side of the heat sink. An air intake port, an air outlet on the opposite side of the heat sink, and an air exhaust port that exhausts air that hits the heat sink. And a partition plate that partitions the first space including the intake port and the second space including the exhaust port, and the blower is directed from the intake port toward the first space. A configuration is adopted in which air is sucked from diagonally below and exhausted diagonally downward from the second space via the exhaust port.

  The blower unit for lighting device of the present invention is formed on the outer peripheral side of the heat sink that is opposite to the outer periphery of the heat sink with respect to the intake port, the heat sink that dissipates the heat of the LED, the intake port formed on the outer peripheral side of the heat sink An exhaust port for exhausting air that hits the heat sink, a blower device that is provided above the heat sink and that blows air sucked through the intake port toward the heat sink, and a first space including the intake port and the exhaust port. And a partition plate that partitions the second space including the air blower. The air blower takes air from the intake port toward the first space obliquely from below and exhausts the air from the second space through the exhaust port obliquely downward.

  According to the present invention, the intake port and the exhaust port are arranged apart from each other on the left and right sides of the LED lamp body, and the intake and exhaust are separated. Since the flow of air can be used effectively, the heat dissipation effect of the blower that is the cooling means can be enhanced. Furthermore, since the air is taken in from the diagonally lower side and exhausted from the lower side, the light distribution angle of the LED lamp can be increased, and the space in which the LED lamp can irradiate light can be increased while satisfying the cooling performance.

The perspective view of the illuminating device which concerns on embodiment of this invention The perspective view of the illuminating device which concerns on embodiment of this invention The exploded perspective view of the illuminating device which concerns on embodiment of this invention The exploded perspective view of the illuminating device which concerns on embodiment of this invention The perspective view which shows the detailed structure of the heat sink of the illuminating device which concerns on embodiment of this invention. Sectional drawing of the heat sink with which the air blower of the illuminating device which concerns on embodiment of this invention was mounted The perspective view explaining the flow of the wind of the illuminating device which concerns on embodiment of this invention Sectional drawing explaining the flow of the wind of the illuminating device which concerns on embodiment of this invention External view of conventional bulb-type lamp

  The invention described in claim 1 includes an LED, a heat sink provided above the LED and dissipating heat of the LED, a case provided above the heat sink and having an opening on the heat sink side, and an outer peripheral side of the heat sink. An air inlet formed on the opposite side of the outer periphery of the heat sink with respect to the air inlet and on the outer peripheral side of the heat sink; and an exhaust port for exhausting air that hits the heat sink; And a partition plate that partitions the first space including the intake port and the second space including the exhaust port, and the blower device extends from the intake port to the first space. The lighting device is characterized in that the air is sucked from diagonally downward and exhausted diagonally downward from the second space through the exhaust port, and the intake port and the exhaust port are separated to the left and right of the LED lamp body. By separating the intake and exhaust air, and taking in air from diagonally below and exhausting diagonally downward, it is always possible to take in cold air and use it for cooling, so that the flow of air can be used effectively. The heat dissipation effect of a certain blower can be enhanced. Furthermore, since the air is taken in from the diagonally lower side and exhausted from the lower side, the light distribution angle of the LED lamp can be increased, and the space in which the LED lamp can irradiate light can be increased while satisfying the cooling performance.

  The invention according to claim 2 is the lighting device according to claim 1, wherein the air inlet, the air blower, and the air outlet are arranged in substantially the same plane along the heat sink. Thus, the air sucked and exhausted can be effectively applied, and the intake port and the exhaust port can be effectively separated from each other, so that the cooling effect can be improved.

  The invention according to claim 3 is the illumination device according to claim 1, wherein the partition plate partitions the intake port and the blower device, and the blower device is disposed in the second space. Therefore, intake and exhaust can be effectively performed.

  According to a fourth aspect of the present invention, there is provided a heat sink that dissipates the heat of the LED, an intake port formed on the outer peripheral side of the heat sink, and the opposite side of the outer periphery of the heat sink with respect to the intake port, and formed on the outer peripheral side of the heat sink. An exhaust port for exhausting air that hits the heat sink; a blower device that is provided above the heat sink and blows air sucked through the intake port toward the heat sink; a first space including the intake port; and an exhaust port And a partition plate for partitioning the second space, wherein the air blower sucks air from the lower side toward the first space from the air inlet, and exhausts the air from the second space to the lower side through the exhaust port. It is a lighting unit blower unit, and the intake and exhaust openings are arranged separately on the left and right sides of the LED lamp body to separate the intake and exhaust, and it is always cold by sucking from the lower side and exhausting from the lower side. And the intake gas is used to cool, it is possible to utilize a flow of air effectively, it is possible to enhance the heat dissipation effect of a cooling unit blower. Furthermore, since the air is taken in from the diagonally lower side and exhausted from the lower side, the light distribution angle of the LED lamp can be increased, and the space in which the LED lamp can irradiate light can be increased while satisfying the cooling performance.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, although the Example described below is a suitable specific example of this invention and limitation of technically favorable conditions is described, the scope of the present invention limits this invention especially in the following description. Unless otherwise stated, it is not limited to these conditions.

(Embodiment)
1 and 2 are perspective views of a lighting device according to an embodiment of the present invention. FIG. 1 is a view seen from above, and FIG. 2 is a view seen from below.

  3 and 4 are exploded perspective views of the lighting device according to the embodiment of the present invention. FIG. 3 is a view from above, and FIG. 4 is a view from below.

  As shown in FIGS. 1 to 4, the LED lamp 100 has a case 110 having a base 110 a and an opening 110 b, an LED substrate 120 on which the LED 121 is mounted, a heat sink 130 that cools the heat generated by the LED 121, and a heat sink 130. And a base 23 for receiving power supply from the outside.

  In addition, the LED lamp 100 includes a power supply substrate 150 that supplies power to the LED substrate 120 and the air blower 140, and an irradiation unit 160 that is attached below the heat sink 130 and has a lens that diffuses light from the LED 121.

  The LED substrate 120, the heat sink 130, the blower 140, the power supply substrate 150, and the irradiation unit 160 are fixed in the case 110.

  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 increases in diameter from the end side to which the base 23 is attached to the 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. 5 and 6.

  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 air intake surface provided on the surface opposite to the air exhaust surface facing the heat sink 130, and the air sucked through the air inlet 131 is exhausted from the air exhaust surface of the air blower 140. Then, the air is blown toward the heat sink 130.

  The power supply board 150 supplies direct current power to the LED board 120 and the blower 140.

  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 made of light diffusing glass or synthetic resin. The lens covers the light emitting surface of the LED 121 and diffuses the light from the LED 121.

  FIG. 5 is a perspective view showing a detailed configuration of the heat sink of the lighting device according to the embodiment of the present invention.

  As shown in FIG. 5, the heat sink 130 includes an outer peripheral portion 130 a having the same diameter as the opening 110 b (see FIG. 4) of the case 110 and a cylindrical portion 130 b that accommodates the circular LED substrate 120 (see FIG. 4). .

  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 oblique lower surface of the heat sink 130. The diagonally downward direction refers to the outer circumferential direction (centrifugal direction) of the heat sink 130 and the direction of the irradiation unit 160 rather than the base 23 direction when viewed from 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, an annular space is formed on the outer periphery of the air blower 140. An intake port 131 is formed on one side of the circumference of the heat sink 130, 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.

  Further, 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 an intake port 131, and the semicircular side having a small space is an exhaust port. 132. A large (here, tall) radiating fin 133 is formed on the heat sink 130 on the intake port 131 side, and a small (here, short) radiating fin 134 is formed on the heat sink 130 on the exhaust port 132 side.

  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 hits the partition plate 135 and changes its flowing direction, and flows into the suction port of the blower 140 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 inlet to the blower 140 and adjusts the air flow.

  FIG. 6 is a cross-sectional view of the heat sink on which the air blower of the illumination device according to the embodiment of the present invention is placed. 6 is a cross-sectional view taken along line AA in FIG.

  In the present embodiment, the blower 140 uses a centrifugal fan that blows out air so as to push out in the rotation direction (centrifugal direction) of the fan blade 143. That is, in FIG. 6, air is sucked in from above the center of the air blower 140, and the air is discharged in the horizontal direction of the drawing by the centrifugal force generated by the rotation of the fan blade 143.

  The centrifugal fan is easier to blow in the rotation direction of the fan (corresponding to the horizontal direction in FIG. 6) than the axial fan that blows in the fan rotation axis direction (corresponding to the vertical direction in FIG. 6). The present invention performs intake / exhaust in the left-right direction, unlike the conventional example of FIG. Therefore, the cooling effect can be improved by installing the centrifugal fan device.

  Moreover, when the air path resistance of the place which installs a fan is large by size reduction etc. of the air blower 140 etc., the force which discharges a wind can be enlarged by the direction which employ | adopts a centrifugal fan.

  In addition, even if an axial fan is mounted on the blower 140, the same effect can be obtained although it does not reach the centrifugal fan. Further, when the case 110 is larger than a certain value, the air path resistance is reduced, and it is more efficient to mount an axial fan.

  As shown in FIG. 6, 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.

  The motor 146 is attached so as to be hung from the sheet metal cover 147. Therefore, a space in which air flows is created between the motor 146 and the heat sink 130, and the flow of cooling air can be made smooth.

  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 flow of wind in the lighting device configured as described above will be described in detail.

  7 and 8 are diagrams for explaining the flow of wind in the lighting apparatus according to the embodiment of the present invention.

  FIG. 7 is a perspective view illustrating the wind flow of the lighting device according to the embodiment of the present invention, and FIG. 8 is a cross-sectional view illustrating the wind flow of the lighting device according to the embodiment of the present invention. . 7 and 8, solid arrows and broken arrows indicate the flow of wind.

  As shown in FIGS. 7 and 8, 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 with a large space is an intake port 131, and the semicircular side with a small space is an exhaust port 132. Of course, the inlet 131 and the outlet 132 are not limited to the same plane. That is, the intake direction and the exhaust direction need only be obliquely downward.

  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.

  As shown in FIG. 8, inclined surfaces (P surface and Q surface) are formed on a part of the heat sink 130 at the intake port 131 and the exhaust port 132 provided in the heat sink 130.

  This inclined surface forms a flow of air sucked from diagonally lower right (in FIG. 8) in the case of intake and exhausted to diagonally lower left (in FIG. 8) in the case of exhaust when intake and exhaust are performed by the blower 140. Form a wind flow.

  The angle of the inclined surface with respect to the rotation axis direction of the blower 140 is approximately 45 °, but is set so as not to cover the edge portion of the irradiation unit 160 to be irradiated in a wider range within the range of 20 ° to 70 °. do it.

  In addition, the surface of the outer peripheral part 130a where the P surface and the Q surface face each other may be a surface formed with an inclination. An inclined surface may be formed on at least one of the opposing surfaces, but it is more effective if it is on both surfaces.

  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. That is, a space (first space) including the air inlet 131 and the large heat radiating fins 133, a space including the air outlet 132, the small heat radiating fins 134, most of the cylindrical portion 130b of the heat sink 130, and the blower 140 (second air). Space) is divided by the partition plate 135 into two spaces.

  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 FIG. 8, when the air blower 140 is operated, wind is sucked from the intake port 131 obliquely below the heat sink 130 along the inclined surface (P surface) of the heat sink 130, and between the large radiating fins 134 of the heat sink 130. The heat sink 130 is cooled and hits the partition plate 135 and reaches the upper portion of the blower device 140 along the side surface of the partition plate 135. Then, it passes through the suction port of the sheet metal cover 147 and is drawn into the blower 140 from above, and is discharged diagonally downward along the inclined surface (Q surface) of the heat sink 130 from the exhaust port 132 obliquely below the heat sink 130 ( Wind flow arrow in FIG. 8).

  The flow of wind, that is, air will be described in more detail. The air drawn from the suction port 301 and the suction port 302 of the sheet metal cover 147 is drawn into the blower 140 that is a centrifugal fan.

  The air sucked from the suction port 301 in the sheet metal cover 147 flows obliquely downward by the pushing force of the fan blade 143 and the inclination of the auxiliary fin 202, hits the small heat radiation fin 134 of the heat sink 130, and smoothly cools the heat sink 130. The air is exhausted obliquely downward along the inclined surface (Q surface) of the heat sink 130 from the exhaust port 132.

  On the other hand, the air sucked from the suction port 302 in the sheet metal cover 147 flows obliquely downward due to the pushing force of the fan blade 143 and the inclination of the auxiliary fin 202, and flows into the space surrounded by the partition plate 135 and the heat sink 130. Since the air sucked from the suction port is smoothly discharged from the exhaust port 132 as described above, the air flowing into the space surrounded by the partition plate 135 and the heat sink 130 is blasted by the air flow. It passes between the device 140 and the heat sink 130 and is smoothly discharged obliquely downward along the inclined surface (Q surface) of the heat sink 130 from the exhaust port 132 while cooling the heat sink 130. Note that the auxiliary fins 202 are not necessarily required, and the auxiliary fins 202 are discharged obliquely downward without the auxiliary fins 202.

  That is, by forming inclined surfaces at the intake port 131 and the exhaust port 132, the air flow generated by the operation of the air blower 140 can be sucked from diagonally below and exhausted diagonally downward. The heat sink 130 can be sufficiently cooled. Since the air flow is smooth, the air that has cooled the heat sink 130 can be discharged from the exhaust port 132 without stagnation.

  Further, as shown in FIG. 8, the air inlet 131 is provided near the outer end of the heat sink 130, and after the outside air passes through the air inlet 131, it flows into the space that is widened inside the heat sink 130. The flow of the sucked air can be guided obliquely upward.

  Further, the exhaust port 132 is disposed so as to be positioned below the lower end of the fan blade 143 of the blower 140 and outside the outer diameter of the fan blade 143. By doing so, the flow of air exhausted from the exhaust port 132 can be guided obliquely downward.

  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. In contrast, in the present embodiment, as shown in FIG. 8, the intake port 131 and the exhaust port 132 are arranged at positions farthest from the left and right ends of the opening 110 b of the case 110 in terms of structure. It is possible to always inhale cold air and use it for cooling, and the heat dissipation effect by the blower 140 can be remarkably enhanced.

  Furthermore, since the intake direction is set obliquely upward and the exhaust direction is set obliquely downward, warm air once exhausted can be prevented from being immediately reused for intake.

  In addition, since the air intake and exhaust ports are provided obliquely in the downward direction, it is difficult to take dust and the like drifting in the air into the case 110, the dirt of the air passage can be prevented, and the increase of the air flow resistance of the air passage is prevented. The cooling performance of the blower 140 can be maintained. That is, if the air inlet 131 is formed in the upward direction, the diagonally upward direction, or the lateral direction, it is easy to positively suck in dust that flows in from above. In order to prevent this, in this embodiment, the intake direction is set obliquely downward. Further, since the heat sink 130 is downward as viewed from the blower 140, it is necessary to blow downward in order to efficiently apply the wind of the blower 140 to the heat sink 130. That is, when the exhaust direction is the lower direction, the air blown to the heat sink 130 side can be exhausted with a low air path resistance. Conversely, if the exhaust direction is the upward direction, the air path resistance increases, and the air blowing efficiency is considerably reduced.

  In addition, since the intake / exhaust direction is set obliquely below, the size of the irradiation unit 160 in the lateral direction can be increased, so that the light from the irradiation unit 160 can be irradiated over a wide range. In other words, when the intake / exhaust direction is set to be directly below, nothing can be provided directly below the intake port 131 and the exhaust port 132 in order to secure an intake / exhaust air path. On the other hand, the larger the irradiation unit 160, the wider the range of light from the irradiation unit 160. Moreover, in order to irradiate the light of LED121, LED121 and the irradiation part 160 are always arrange | positioned below the heat sink 130. FIG. That is, the LED 121 and the irradiation unit 160 are always disposed below the intake port 131 and the exhaust port 132. As described above, if the intake / exhaust direction is set to a directly downward direction, the area of the irradiation unit 160 becomes very small in order to secure the air path. As a result, the light irradiation range is limited. However, in the present embodiment, the intake / exhaust direction is obliquely downward, so that the irradiation unit 160 can be arranged directly below the intake port 131 and the exhaust port 132. In addition, since the flow of wind from the intake port 131 to the exhaust port 132 is not in the vertical direction but in the horizontal direction, the overall air path resistance is suppressed by setting the intake / exhaust direction to be diagonally downward rather than downward, Intake and exhaust can be performed smoothly.

  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 FIG. 8, 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 region for arranging the connector and wiring for connecting the LED substrate 120 and the power supply substrate 150 is 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 and the wiring is secured on the side of the widely formed inlet 131. Since the exhaust port 132 side has a higher wind speed than the intake port 131 side, the wind is likely to leak if a hole or the like is formed on the exhaust port 132 side. As in the present embodiment, the inlet 131 side is formed wider than the exhaust outlet 132 side, and holes are opened to prevent wind leakage, and connectors and wiring are arranged on the inlet 131 side where the wind speed is low. Thus, it is possible to prevent the flow of the wind as much as possible.

  Moreover, in this Embodiment, although the partition plate 135 is formed in the heat sink 130, you may combine each individual component. When the heat sink 130 and the partition plate 135 are integrated, since the partition plate 135 is a part of the heat sink 130, the heat conduction is better 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 heat radiation fin 133 on the intake port 131 side is formed larger (higher) than the heat radiation 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 radiating fins 134 obstruct the exhaust port 132 side and the wind speed tends to drop. On the other hand, since the intake port 131 side sucks air uniformly in the entire intake port 131, the radiating fins 133 are less likely to become wind resistance, and the radiating fins 133 can be formed larger. In addition, if the radiation fins 133 are formed larger or more, the heat radiation 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 air blower 140 on the intake port 131 side, the wind immediately after passing through the air blower 140 has a high inertia and thus has a strong inertia and wants to go straight. 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. There is the following demerit that it becomes a big resistance to the wind.

  Further, the partition type includes a box fan type and a heat sink integrated type. In the present embodiment, the heat sink integrated type in which the partition plate 135 is formed on the heat sink 130 has been described. On the other hand, the box fan type is provided with an annular partition plate 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 surrounds the outer periphery of the blower 140, the rectifying effect is high, and 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, And 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 on the same plane of the case 110. And are arranged on different sides.

  With the above-described configuration, the wind is sucked from obliquely below the air inlet 131 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 obliquely downward from the exhaust port 132 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.

  In addition, since the air intake and exhaust ports are provided obliquely in the downward direction, it is difficult to take dust and the like drifting in the air into the case 110, the dirt of the air passage can be prevented, and the increase of the air flow resistance of the air passage is prevented. The cooling performance of the blower 140 can be maintained. In addition, since the intake / exhaust direction is set obliquely below, the size of the irradiation unit 160 in the lateral direction can be increased, so that the light from the irradiation unit 160 can be irradiated over a wide range.

  Moreover, the inlet 131, the air blower 140, and the exhaust 132 are good to arrange | position on the substantially same plane along a heat sink. Thereby, the air sucked and exhausted to the heat sink 130 can be effectively applied, and the intake port 131 and the exhaust port 132 can be effectively separated from each other, so that the cooling effect can be improved. it can.

  Further, the partition plate 135 may partition the air inlet 131 and the blower 140. Since the air blower 140 is disposed in the space on the exhaust port 132 side, intake and exhaust can be effectively performed.

  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 blowing unit of the present invention are suitable for a bulb-type LED lamp including a blasting device that cools the LED mounting substrate.

23 Base 100 LED lamp 110 Case 110a Base 110b Opening 120 LED substrate 121 LED
DESCRIPTION OF SYMBOLS 130 Heat sink 131 Intake port 132 Exhaust port 133, 134 Radiation fin 135 Partition plate 140 Blower 143 Fan blade 147 Sheet metal cover 150 Power supply board 160 Irradiation part 202 Auxiliary fin 301, 302 Inlet

Claims (4)

LED,
A heat sink provided above the LED and dissipating heat of the LED;
A case provided above the heat sink and having an opening on the heat sink side;
An air inlet formed on the outer peripheral side of the heat sink;
An exhaust port that is formed on the outer peripheral side of the heat sink, on the opposite side of the outer periphery of the heat sink with respect to the intake port, and exhausts air that has hit the heat sink,
A blower that is housed inside the case and blows air that has been sucked 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,
The illuminating device, wherein the air blower sucks air from an obliquely downward direction toward the first space from the intake port and exhausts the obliquely downward direction from the second space through the exhaust port.   The lighting device according to claim 1, wherein the intake port, the blower, and the exhaust port are arranged on substantially the same plane along the heat sink.   The lighting device according to claim 1, wherein the partition plate partitions the inlet and the blower. A heat sink that dissipates the heat of the LED;
An air inlet formed on the outer peripheral side of the heat sink;
An exhaust port that is formed on the outer peripheral side of the heat sink, on the opposite side of the outer periphery of the heat sink with respect to the intake port, and exhausts air that has hit the heat sink,
A blower provided above 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,
The air blower unit for an illuminating device, wherein the air blower sucks air from the intake port toward the first space obliquely from below and exhausts the air from the second space through the exhaust port obliquely downward.