JP5062342B2 - Illumination device and blower for illumination device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting device capable of improving heat radiation effects with a blower by making a wind generated by the blower efficiently flow to a heat sink even if the lighting device hardly concentrate the wind generated by the blower to the heat sink due to its shape. <P>SOLUTION: The lighting device includes a light-emitting element 151, the heat sink 120 thermally connected with the light-emitting element 151 and radiating heat generated by the light-emitting element 151, the blower 130 having blades generating the wind for radiating the heat of the heat sink 120, a case 110 having a metal cap 101 at one end and storing the blower 130, and a frame 137 for regulating a wind path of the wind in the circumference of the blades in a centrifugal direction. A gap which becomes the wind path of the wind in a rotary axis direction of the blades is arranged between the heat sink 120 and the frame 137. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

The present invention relates to a lighting device including a blower and a blower for a lighting 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 blower 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 drive circuit that is provided on the substrate and drives the air cooling means.

JP 2007-265892 A JP 2010-108774 A

  However, the light bulb shaped lamp described in Patent Document 2 has a problem that even if air is sent to the radiator by air cooling means, the wind does not concentrate on the radiator, so that the heat dissipation effect is not easily achieved. That is, in a lighting device having a base at one end, the thickness gradually increases from the base side to the LED side due to its general shape. That is, the wind in the air cooling device also spreads outward as it goes from the air cooling device side to the LED side, and the wind cannot be concentrated well on the radiator. Therefore, it can be said that the forced force of the heat generated by the air cooling device to the heat radiating body is weak.

  The object of the present invention is to efficiently apply the wind generated by the blower to the heat sink even if it is difficult to concentrate the wind generated by the blower on the heat sink due to its shape. It is providing the illuminating device which improved.

The illumination device of the present invention is disposed between a light emitting element, a heat sink thermally connected to the light emitting element, a case having an opening on the heat sink side, the heat sink and the case, and An air blower having blades for generating heat radiating wind, and the blades are formed so as to surround the blades in the centrifugal direction so that the wind path of the wind is directed toward the heat sink in the rotation axis direction of the blades. A gap that serves as the wind path of the wind in the direction of the rotation axis of the blade, and the wind path of the wind in the gap is provided between the heat sink and the frame . The configuration is the centrifugal direction .

  According to the present invention, due to the shape, even if it is difficult to concentrate the wind generated by the blower on the heat sink, the wind generated by the blower is efficiently applied to the heat sink, and the heat dissipation effect by the blower It is possible to provide a lighting device that can improve the above.

1 is an external view of a lighting device according to an embodiment of the present invention. The exploded perspective view of the illuminating device which concerns on the said embodiment. Sectional drawing of the air blower of the illuminating device which concerns on the said embodiment. (A) Front view of the blower, (b) Rear view of the blower, (c) Perspective view from the rear side of the blower, (d) Perspective view from the front side of the blower The figure explaining the flow of the wind of the illuminating device in embodiment of this invention (A) The figure which shows the difference of the heat dissipation effect with the case where it is not provided with the surrounding part, (b) The difference in the heat dissipation effect by the position of the wing when the distance between the heat sink and the outermost part of the peripheral part is made constant Figure showing

The invention according to claim 1 is disposed between the heat emitting element, the heat sink thermally connected to the light emitting element, a case having an opening on the heat sink side, the heat sink, and the case. An air blower having blades for generating wind to dissipate the heat of the blades, and the blades are formed to surround the blades around the centrifugal direction of the blades. A frame that restricts the air flow toward the air gap, and a gap is formed between the heat sink and the frame to serve as an air passage for the wind in the direction of the rotation axis of the blades, and the air passage for the wind is provided in the gap. a lighting apparatus characterized by comprising a centrifugal direction of the blade, due to its shape, is to be difficult illuminated instrumentation concentrate generated allowed wind to the heat sink of the blower Even the wind blowing device generates against efficiently heat sink, can improve the heat dissipation effect of the blower.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following, the axial direction refers to the direction in which the motor shaft extends.

(Embodiment)
FIG. 1 is an external view of a lighting device according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the lighting device. FIG. 3 is a cross-sectional view of the blower of the lighting device according to the present embodiment. Hereinafter, the illuminating device which concerns on this invention is demonstrated with the example embodied with the light bulb-shaped LED lamp.

  As shown in FIG. 1, the light bulb-type LED lamp 100 is configured by attaching a heat sink 120 on which, for example, an LED, which is a light emitting element, to a case 110 and attaching a lens 160 to the heat sink 120 so as to cover the LED.

  More specifically, as shown in FIGS. 1 and 2, a light bulb shaped LED lamp 100 includes a case 110 having a base 110a at one end attached to the base 101 and an opening 110b having the other end opened in a cylindrical shape. The outer peripheral portion 120a is attached to the opening 110b with the same diameter, and the heat sink 120 that cools the LED 151 via the LED mounting substrate 150, the air blower 130 that is supported in the case 110 and blows toward the heat sink 120, and its power source A substrate 140 and a spherical lens 160 attached to the outer peripheral end 120b of the heat sink 120 are provided.

  As shown in FIGS. 2 and 3, the air blower 130 includes a motor 131 and a blade 133 that is attached to one end of the shaft 132 of the motor 131 in the axial direction and rotates. The end portion of the shaft 132 to which the blade 133 is attached is disposed on one end side of the case 110, and the shaft 132 portion to which the blade 133 is not attached is disposed on the heat sink 120 side. Further, the end portion of the shaft 132 to which the blade 133 is attached may be disposed on the heat sink 120 side, and the shaft 132 portion to which the blade 133 is not attached may be disposed on one end side of the case 110. The air blower 130 includes a frame 137 that covers the outer periphery of the blade 133, and the frame 137 contacts the heat sink 120 and does not contact the blade 133 and the shaft 132.

  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 base 110a on one end side to the opening 110b on the other end side. A base 101 is embedded in the base 110a from the outside. In the opening 110b at the other end of the case 110, a heat sink 120 having an outer peripheral portion 120a having substantially the same diameter is fastened together with a blower 130 installed in the case 110 by a screw 171 to a screwing 110d on the inner wall of the case 110. Is done. In addition, a plurality of air inlets 110 c are formed in a long hole shape along the axial direction of the case 110 and spaced apart from each other in the circumferential direction on the outer peripheral surface of the case 110.

  The base 101 is of an E17 type, for example, and is electrically connected to the power supply board 140 and the LED mounting board 150 side by wiring (not shown), and includes a screw thread that is screwed into the lamp socket of the bulb-type LED lamp 100.

  The heat sink 120 is screwed inside the case 110 and on one end side of the case 110 so as to be separated from the inner wall of the case 110. The blower 130 is screwed to the heat sink 120. Of course, the blower 130 may be in another form such as being screwed together with the heat sink 120 in the case 110 and on one end side of the case 110, separated from the inner wall of the case 110. Moreover, the air blower 130 may be accommodated so as to be covered with the heat sink 120 and the fins 120a in the bottom surface and the centrifugal direction.

  The air blower 130 cools the heat sink 120 by causing an air flow through the heat sink 120.

  The blower 130 is configured by unitizing a motor 131, a blade 133 that is rotationally driven by the motor 131, and a frame 137 that covers the outer periphery of the blade 133. The blade 133 is attached to the shaft 132 of the motor. The shaft 132 may be attached so as to extend from the base 101 side, or may be attached so as to extend from the heat sink 120 side. By being attached so as to extend from the base 101 side, the following effects can be obtained. That is, the shaft 132 has an attachment portion of the blade 133 and a non-attachment portion of the blade 133, and the outer diameter of the attachment portion of the blade 133 is much larger than the outer diameter of the non-attachment portion. Furthermore, since there is a frame 137 for adjusting the direction of the wind on the outer periphery of the attachment portion of the blade 133, the outer diameter of the difference between the attachment portions of the blade 133 is very large as shown in FIG. Moreover, the attachment part of the blade | wing 133 has a large wind strength. In some cases, the blower 130 is installed in the case 110 such that the attachment portion of the blade 133 having a large outer diameter and a large blowing force faces the LED mounting substrate 150 via the heat sink 120. In that case, the blower 130 may be installed such that the non-attached portion of the blade 133 faces the base 110 a in the case 110. Now, when looking again at the shape of the case 110, the case 110 has a hemispherical shape in which the diameter is reduced toward the base 110a and the opening 110b is gradually enlarged. For this reason, the non-attached portion of the blade 133 is satisfactorily accommodated on the base 110a side in the case 110, while the attached portion of the blade 133 is stored together with the frame 137 in the opening 110b of the case 110 with a margin. In other words, it is possible to use a blade having a large diameter that matches the size of the opening 110b of the case 110, and it is possible to realize a blower that is quiet and has good cooling efficiency.

  Further, the shaft 132 is attached so as to extend from the heat sink 120 side, and the following effects are obtained. That is, since the frame 137 can be firmly fixed to the heat sink, the strength is improved. Although the blade 133 rotates around the shaft 132, the heat sink 120 can support the rotation of the blade 133. In addition, since the motor 131 and the blade 133 are firmly fixed by the heat sink 120, vibration due to the rotation of the blade 133 can be suppressed and noise can be suppressed.

  In the blower device 130, the power supply board 140 is placed on the base 110 a side, and the power supply board 140 is attached to the inner wall of the base 110 a with screws 172. Electronic components such as capacitors are mounted on the power supply board 140, but these electronic components are arranged as far as possible from the LED 151 and are arranged closer to the base 101 than the blower 130 so that heat is not transmitted to the electronic components.

  In the blower device 130, the motor 131, the blade 133, and the like are housed in the frame 137. The blower 130 is screwed to the heat sink 120. Further, the frame 137 containing the motor 131 may be fastened together with the screw 171 to the screwing 110d on the inner wall of the case 110 together with the heat sink 120 from the bottom by the flange portion through hole 137d.

  Since the LED mounting substrate and the power supply substrate are arranged apart from each other, there is an advantage that the heat generation is dispersed and the cooling effect is improved.

  The LED mounting board 150 on which the LED 151 is mounted is attached to the heat sink 120, and the heat generated by the LED 151 mounted on the LED mounting board 150 is cooled. The heat sink 120 includes fins 120a and improves the cooling effect. The air blower 130 may be disposed so as to cover the upper portion of the fin 120a of the heat sink 120, or the air blower 130 may be disposed so as to be covered with the fin 120a. By disposing the blower 130 so as to cover the top of the fins 120a of the heat sink 120, the blade 133 of the blower 130 can be formed large in the centrifugal direction. This is because the fin 120a does not hinder the enlargement of the blower 130. As a result, the blowing efficiency of the blower 130 is improved, and the cooling effect of the blower 130 is improved. In addition, by arranging the blower 130 so that the periphery thereof is covered by the fins 120a, the fins 120a can efficiently dissipate the wind discharged by the blower 130. As a result, the heat generation of the LED 151 can be efficiently cooled. In particular, it is preferable to provide fins 120a around the B region (gap) in the centrifugal direction. That is, the fin 120a is made equal to or higher than the height of the B region in the axial direction, and the wind flowing from the inside to the outside of the blower 130 in the B region sufficiently hits the fin 120a. Thereby, the wind can efficiently dissipate heat transmitted to the fins 120a. That is, the air exhausted from the exhaust port 120a after the heat sink 120 has radiated heat (in this embodiment, the fin 120a also functions as an exhaust port) can be used again for heat dissipation of the fin 120a.

  The heat sink 120 is made of a metal material such as copper, aluminum, or an alloy thereof having good thermal conductivity, for example, and releases the air from the blower 130 accommodated in the central portion to the outside through the exhaust port 120a formed in the outer peripheral portion. .

  A spherical lens 160 is attached to the outer peripheral end 120 b of the heat sink 120. The heat sink 120 is disposed so as to be sandwiched between the case 110 and the lens 160. Note that the air inlet 110c and the heat sink 120 exhaust 120a of the case 110 may be in the opposite wind direction. The power supply board 140 is a power supply circuit for supplying DC power to the blower 130.

  The LED mounting board 150 mounts the LED 151. The LED mounting substrate 150 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 mounting substrate 150 is in contact with the heat sink 120 to dissipate heat.

  The LED mounting substrate 150 is provided in contact with the heat sink 120 that cools the heat generated by the LEDs 151.

  The lens 160 is formed in a flat spherical shape with light-diffusing glass or synthetic resin, and covers the LED mounting substrate 150 to diffuse the light from the LED 151.

  As described above, the power supply board 140, the air blower 130, the heat sink 120, and the LED mounting board 150 are arranged inside the case 110 and the lens 160 in order from the base 110 a side of the case 110.

  The lens 160 is bonded to the heat sink 120, and the LED mounting substrate 150 and the LED 151 are disposed between the lens 160 and the heat sink 120.

  The power supply board 140 mounts a power supply unit that supplies power to the blower 130.

  The power supply board 140 is fixed to the case 110 with screws 172, and the heat sink 120 and the blower 130 are fixed to the case 110 with screws 171. The air blower 130 and the heat sink 120 have a circular shape, and the heat sink 120 has a larger diameter. Further, the blower 130 and the heat sink 120 may be integrated.

  4A is a front view of the blower, FIG. 4B is a rear view of the blower, FIG. 4C is a perspective view from the rear side of the blower, and FIG. ) Is a perspective view from the front side of the blower.

  As shown in FIGS. 3 to 4, the air blower 130 includes a motor 131, a shaft 132, a blade 133 that is rotationally driven by the shaft 132, a stator, an annular magnet 135, an air blower control board 136, A frame 137 covering the outer periphery of the blade 133 is configured as a unit. The blade 133 is attached to the end of the shaft 132 of the motor 131.

  The shaft 132, the stator, the annular magnet 135, and the blower control board 136 constitute a motor 131 as a whole.

  The frame 137 is fixed to the heat sink 120 by screws passing through the flange portion through hole 137d, and the heat sink 120 is fixed to the case 110 by screws 171.

  Here, the frame 137 is in contact with the heat sink 120, while other components such as the blade 133, the shaft 132, and the stator are not in direct contact. For this reason, the heat of the heat sink 120 does not directly move to other parts such as the blade 133, the shaft 132, and the stator. Further, the frame 137 and the heat sink 120 may be spaced to prevent direct contact.

  The frame 137 includes a flat portion 137 a that supports the blade 133, the shaft 132, the stator, and the like, and a peripheral portion 137 b that is formed so as to surround the periphery of the blade 133. The flat portion 137a and the peripheral portion 137b are connected by a plurality of leg portions 137c. In this embodiment, there are three leg portions 137c, and it is preferable to provide at least two leg portions. Although it is not necessarily restricted to this, when it is two, in order to raise the intensity | strength of the leg part 137c, it is better to form thickly. In that case, since the flow of the wind is hindered, it is better to form the leg portions 137c to be thin with three or more legs. In the present embodiment, the thickness of the leg portion 137c is approximately 4 mm to 8 mm. In the present embodiment, the outer diameter of the peripheral portion 137b is approximately 30 mm. Moreover, the flat part 137a and the surrounding part 137b may be formed by integral molding with the plurality of leg parts 137c, or may be formed and joined.

  The shaft 132 is rotatably supported by the flat portion 137a, and rotates the blade 133. The rotation of the blade 133 is driven by an annular magnet 135 and a stator.

  The stator 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 by electrodeposition coating or the like, and a coil is wound through the insulating layer. A magnetic field is generated by passing an electric current through the coil, and the stator is driven by being attracted and repelled by the magnet 135.

  The structure of the drive unit is not limited to the above structure, and any structure may be used as long as it can drive the blower 130.

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

  FIG. 5 is a diagram for explaining the wind flow of the lighting apparatus according to the embodiment of the present invention. In FIG. 5, a solid line and a broken line arrow show the flow of the wind.

  As shown in FIG. 5, the wind is sucked from the air intake port 110c and exhausted from the air exhaust port 120a formed by the gap between the fins 120a. However, the wind flow may be in the opposite direction as described above.

  Next, the peripheral portion 137b will be described in detail. As shown in FIG. 3, the periphery of the motor 131 and the blade 133 in the centrifugal direction is divided into an A region on the blade 133 side and a B region on the motor 131 side. That is, the area A is an area where the peripheral portion 137b is provided around the motor 131 and the blade 133 in the centrifugal direction, and the area B is an area where the peripheral portion 137b does not exist. As shown in FIG. 4C, the leg portion 137c is formed even in the region B, but at least a part of the peripheral portion 137b is removed. That is, in the region B, it is desirable that a gap serving as an air passage is provided in all portions of the annular frame 137 except the leg portion 137c, but the gap does not necessarily have to be the entire circumference.

  The ratio of the width of the A region and the B region in the motor axial direction is preferably about 2 to 4: 1. That is, the A region is preferably formed larger than the B region. This is because the wind path of the wind is controlled in the area A, and the sealed path can be controlled more effectively by making the area A larger than the area B. However, the present invention is not limited to this, and may be anything such as approximately 1: 1 or approximately 5: 1. In the axial direction, at least the peripheral portion 137b may be configured to surround 50% or more of the blade 133. That is, the width of the height in the axial direction of the peripheral portion 137b may be about 50% to 140% of the height in the axial direction of the blade 133, and preferably 80% to 120%. If the height of the peripheral portion 137b is secured to such an extent, the direction of the wind can be controlled. Further, considering the wind blowing efficiency, as shown in the upper side of FIG. 3, the upper end portion of the peripheral portion 137 b and the upper end portion of the hub that supports the blade 133 extend substantially in a straight line. The direction can be efficiently regulated without wasting the generated wind. Therefore, the wind can be efficiently concentrated on the heat sink 120, and the cooling effect can be improved. However, the peripheral portion 137b may start from the motor side with respect to the uppermost end of the hub. At that time, the vicinity of the uppermost end of the hub is not surrounded by the peripheral portion 137b, and is neither the A region nor the B region. Therefore, it is not necessary for the peripheral portion 137b to surround the entire blade 133, and the blade 133 may protrude from the peripheral portion 137b on either or both of the base 101 side and the heat sink 120 side. However, since the entire blade 133 is surrounded by the peripheral portion 137 b, the direction of the wind can be efficiently regulated and concentrated by the heat sink 120. This means that the wind path that is sucked into the lighting device and the wind path that is exhausted from the lighting device do not intersect, and at the same time, the wind is likely to take heat away from the heat sink 120. A path can be formed.

  Furthermore, in the present embodiment, the peripheral portion 137b is formed in an annular shape that is substantially parallel to the axial direction of the blower 130. However, the peripheral portion 137 b may be inclined with respect to the axial direction of the blower 130 or the heat sink 120. For example, by forming the peripheral portion 137b to be thin on the base 101 side and thick on the heat sink 120 side like a substantially conical shape, the wind speed increases and the cooling effect of the blower 130 is improved. Further, since the sucked wind can be efficiently applied to the heat sink 120, there is little wind loss. In addition, by forming the base 101 side thick and the heat sink 120 side thin like a substantially conical shape, it is possible to avoid unnecessary air circulation. Moreover, since the air exhausted from the exhaust port 120a is prevented from being exhausted as it is from the intake port 110c, it is possible to prevent warm air from being mixed with the wind hitting the heat sink 120. Therefore, the cooling effect can be improved.

  In the present embodiment, the flat portion 137a of the blower device 130 is disposed so as to contact the heat sink 120, the height of the A region in the axial direction is approximately 5 mm, the height of the B region is approximately 3 mm, and the height of the blower device 130. Is approximately 8 mm. In this case, the region B refers to a gap between the heat sink 120 and the lowermost end portion of the peripheral portion 137b. Moreover, when the flat part 137a of the air blower 130 does not contact the heat sink 120, what added the distance of the air blower 130 and the heat sink 120 to the height of B area becomes a clearance gap. The height of the air blower 130 is about 8 mm, and when the air blower 130 contacts the heat sink 120, the area B is preferably 2 to 4 mm. This is because if the distance is 2 mm or less, the peripheral portion 137b prevents the air passage too much, and if it is 4 mm or more, the peripheral portion 137b cannot sufficiently regulate the air passage.

  FIG. 6A is a diagram showing the difference in heat dissipation effect with and without the peripheral portion. The pre-outer peripheral portion 137b has an A area height of about 5 mm in the axial direction, The height is about 3 mm, and the height of the blower 130 is about 8 mm. FIG. 6B is a diagram showing a difference in heat dissipation effect depending on the position of the wing when the distance between the heat sink and the outermost end of the peripheral portion is constant, and is the endmost portion of the heat sink 120 and the peripheral portion 137b. The distance is 3 mm. At this time, when the upper stage is separated, the heat sink 120 and the lower end of the shaft 132 are arranged 3 mm apart, and when the lower stage is contacted, the heat sink 120 is arranged so that the lower end of the shaft 132 is in contact. It is. Moreover, the rotation speed of the air blower 130 is 5000 r / min in both, and the emitted-heat amount of LED151 is 12W. The temperature shown in the figure is the temperature of the LED mounting substrate 150 when the LED 151 is turned on, and Δt is a temperature obtained by subtracting 25 degrees from the temperature, that is, how much higher than the normal temperature. The flow rate represents the flow rate of wind that is taken in from the intake port 110c and exhausted from the exhaust port 120a.

  As can be seen from FIG. 6 (a), it is understood that the heat radiation effect is improved by nearly 50 ° C. only by providing the peripheral portion 137b rather than by providing it. Further, if the peripheral portion 137b is not provided, the difference from the normal temperature (25 degrees) is about twice that of the case where the peripheral portion 137b is provided. Furthermore, by providing the surrounding part 137b, the ventilation efficiency of the air blower 130 is also improved, and the heat dissipation effect with respect to the LED mounting board 150 is clearly improved.

  Further, as can be seen from FIG. 6B, it is understood that the blower device 130 should be as close to the heat sink 120 as possible. The air blower 130 and the heat sink 120 are not necessarily in contact with each other, but the closer to the blower 130, the better the cooling effect on the LED mounting substrate 150. However, there is an advantage that the heat of the heat sink 120 is not directly transmitted to the blower device 130 by separating the blower device 130 from the heat sink 120 and inserting an air layer or a heat insulating material therebetween. That is, it is possible to prevent the life of the air blower 130 from being shortened due to heat generation and extend the life of the air blower 130.

  In this embodiment, the motor 131 is disposed on the heat sink 120 side and the blade 133 is disposed on the base 101 side. However, the blade 133 is disposed on the heat sink 120 side and the motor 131 is disposed on the base 101 side. It may be arranged. In that case, the A region is on the motor 131 side, and the B region is on the blade 133 side. That is, in order to concentrate the wind on the heat sink, the A area is always on the base 101 side so that the wind whose direction is restricted in the peripheral portion 137b of the A area is efficiently concentrated on the heat sink 120 in the B area. The region is always on the heat sink side.

  Moreover, it is good to provide the fin 120a at least around the B region in the centrifugal direction. That is, the fin 120a is made equal to or higher than the height of the B region in the axial direction, and the wind flowing from the inside to the outside of the blower 130 in the B region sufficiently hits the fin 120a.

  Moreover, it is better that the blower 130 is as close to the heat sink 120 as possible. That is, the higher the flow velocity of the wind near the heat sink 120, the heat can be radiated from the heat sink 120, and the cooling effect is improved.

  The illuminating device of the present invention is suitable for use in a bulb-type LED lamp including a blower that cools the LED mounting substrate.

DESCRIPTION OF SYMBOLS 100 Light bulb-shaped LED lamp 101 Base 110 Case 120 Heat sink 130 Blower 131 Motor 132 Shaft 133 Blade 137 Frame 140 Power supply board 150 LED mounting board 151 LED (light emitting element)
160 lenses

Claims (2)

A light emitting element;
A heat sink thermally connected to the light emitting element;
A case having an opening on the heat sink side;
A blower provided with blades arranged between the heat sink and the case to generate wind for radiating the heat of the heat sink;
A frame that is formed so as to surround the blades around the centrifugal direction of the blades, and that restricts the wind path of the wind toward the heat sink side in the rotation axis direction of the blades ,
A gap is formed between the heat sink and the frame to serve as the wind path of the wind in the direction of the rotation axis of the blade, and the wind path of the wind is in the centrifugal direction of the blade in the gap. Lighting device. A heat sink thermally connected to the light emitting element;
A blower provided with blades for generating wind to radiate heat of the heat sink;
A frame that is formed so as to surround the blades around the centrifugal direction of the blades, and that restricts the wind path of the wind toward the heat sink side in the rotation axis direction of the blades ,
A gap is formed between the heat sink and the frame to serve as the wind path of the wind in the direction of the rotation axis of the blade, and the wind path of the wind is in the centrifugal direction of the blade in the gap. Blower for lighting device.