JP2013077579A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device that can restrain temperature rise of a light source by sufficiently cooling one with a flow of air which uses a blower or the like.SOLUTION: The lighting device includes LEDs 1, an LED support 2 preparing a plurality of through-holes 10 and supporting the LEDs 1, a vortex flow fan 17 forming an air flow, and a casing 16 with a cylindrical bottom internally preparing the vortex flow fan 17. The casing 16 is arranged by being opposite to the LED support 2 to make at least a part of the plurality of through-holes 10 locate inside an opening of the casing 16.

Description

  The present invention relates to a lighting device that dissipates heat by an airflow generator.

  In recent years, solid state light emitting devices such as semiconductor lasers and light emitting diodes have attracted attention as new light sources that can replace incandescent bulbs and fluorescent lamps as environmental awareness increases. In particular, a light emitting diode (hereinafter referred to as LED) has a long life and high light conversion efficiency, and an illuminating device using the LED as a light source has attracted attention.

  For example, Patent Document 1 discloses an LED illumination device using an LED as a light source. In this LED illumination device, a substrate having a plurality of LEDs arranged on one surface is provided, and a light transmission plate is provided on the side of the substrate through which the emitted light of the LED is transmitted. On the other surface side of the substrate, a blower that sends air to the other surface of the substrate and driving substrates that perform LED lighting control, blower driving of the blower, and the like are arranged. Further, the LED lead frame is provided on the other surface of the substrate so as to protrude long, and the LED is cooled by removing heat from the lead frame by blowing air from a blower. And the said board | substrate with which LED is arrange | positioned is formed with the hole which allows air to pass from the other surface of the side by which the air blower is arrange | positioned to one surface of the side by which LED is arrange | positioned. Air that has been warmed by removing heat is allowed to escape to the light transmission plate through the hole.

JP 2009-199980 A (published on September 3, 2009)

  However, since the LED illumination device of Patent Document 1 is intended to prevent fogging of the light transmission plate, it cannot be said that it is sufficient from the viewpoint of cooling the LED by the air flow by the blower. Therefore, there exists a problem that the temperature rise in LED and drive board | substrates cannot be suppressed effectively.

  For example, in the configuration of the first embodiment, warmed air circulates inside the housing. In this case, the LED is cooled with warm air, and the cooling effect is not sufficient. Moreover, since the air that has become hotter by sending the heat of the LED to the drive substrates that are thermally weaker than the LED, the temperature rise of the drive substrates cannot be suppressed. It will reduce the service life.

  On the other hand, in the configuration of the second embodiment, since the LED is cooled only by the air warmed by the drive boards, the cooling effect is low compared to the configuration in which the air before being warmed is sent.

  The present invention has been made in view of the above problems, and its object is to sufficiently cool a light source (such as an LED) with an air flow using a blower or the like to suppress a temperature rise of the light source and to provide a housing. An object of the present invention is to provide an illuminating device capable of suppressing a temperature rise of a power supply substrate (driving substrate or the like) incorporated therein.

  In order to solve the above problems, an illumination device according to the present invention includes a light source, a light source support that supports the light source, a power supply substrate that supplies power to the light source, and a power supply substrate support that supports the power supply substrate. And a first air flow that causes air to flow into the first space in which the light source support is disposed from the outside of the lighting device, and discharges the introduced air from the first space to the outside of the lighting device. The air flow generating device that forms the space between the first space and the second space in which the power supply substrate support is disposed, and the air that has flowed into the first space enters the second space And a partition wall for preventing inflow.

  According to this, the first air flow is drawn from the outside of the lighting device into the first space where the light source support is disposed, and does not pass through the second space where the power supply substrate support is disposed. It is discharged outside the lighting device. Therefore, the heat generated by the light source and transmitted to the light source support and the like can be efficiently taken and cooled, and the temperature rise of the light source can be suppressed. In addition, since the air heated by taking away the heat generated by the light source does not flow to the second space where the power supply substrate support is disposed, the temperature rise of the power supply substrate can be suppressed. .

  In the illumination device of the present invention, it is preferable that the air flow generation device is disposed on the first space side with respect to the partition wall, thereby facilitating the first air flow. Can be formed.

  In the illumination device of the present invention, the air inlet and the air outlet for forming the first air flow are formed on the same plane as the surface of the light source support on which the light source is supported. It is preferable to have a configuration.

  According to the above configuration, the heat generated from the light source can be efficiently obtained because the heat is not taken from the heat source such as the light source or the power supply board, and the air can be taken in from the outside of the lighting device and flow through the surface of the light source support. Since the air deprived of heat generated from the light source can be immediately discharged (immediately after depriving of heat), the effect of preventing the inflow of air into the second space can be further enhanced.

  In the lighting device of the present invention, the airflow generator further causes air to flow into the second space from the outside of the lighting device, and heat from the power supply board is transferred to the second space by the inflowed air. It can also be set as the structure which forms the 2nd air flow which thermally radiates outside.

  According to this, since the power supply board can be effectively cooled by the second air flow, the temperature rise of the power supply board can be effectively suppressed.

  In the lighting device of the present invention, the power supply substrate support further has a cylindrical shape in which the flow path of the second air flow is formed, and the power supply substrate is connected to an outer peripheral surface of the power supply substrate support. In addition, it may be configured to be disposed in a space between the outer peripheral member of the lighting device main body and the inner peripheral surface thereof.

  According to this, since the second air flow that radiates heat from the power supply board passes through the inside of the cylindrical power supply board support, the power supply disposed inside the outer member and outside the power supply board support. The substrate will be cooled through the power supply substrate support without being directly exposed to the second air stream. Therefore, even if dust such as dust is sucked together from the outside of the lighting device and dust is mixed in the second air flow 43, they can be prevented from adhering to the power supply board. It is possible to prevent power supply board failure due to dust adhesion.

  In the lighting device of the present invention, as a more specific configuration, the light source support has a plurality of through holes in the outer peripheral portion, and the airflow generator has a spiral shape in a plane perpendicular to the rotation axis. An eddy current fan for generating an air flow, wherein the partition wall is formed of a bottomed cylindrical casing in which the vortex fan is disposed, and the casing has the plurality of through holes inside an opening of the casing. It is good also as a structure which is arrange | positioned facing the said light source support body so that it may be located, and a pair of protrusion close | similar to the front-end | tip of the blade | wing of the said eddy current fan may be formed in the position which opposes on an internal peripheral surface.

In another specific configuration of the illumination device of the present invention, the light source support has a plurality of through holes in an outer peripheral portion, and the airflow generator An axial flow fan for generating a flow, comprising a cylindrical casing in which the axial flow fan is disposed;
The casing may be arranged to face the light source support so that a part of the plurality of through holes is located inside an opening on one end side of the casing.

  ADVANTAGE OF THE INVENTION According to this invention, a light source can fully be cooled with the flow of air using airflow generators, such as an air blower, and the temperature rise of a light source can be suppressed.

It is a longitudinal cross-sectional view of the illuminating device which is one Embodiment of this invention. (A) (b) is an external view which shows the external appearance of the said illuminating device, (a) is the external view which looked at the illuminating device from diagonally upward, (b) is the external view which looked at the illuminating device from diagonally downward. It is. It is the disassembled perspective view which looked at the illumination main-body part in the said illuminating device from the lower surface side. It is the disassembled perspective view which looked at the illumination main-body part in the said illuminating device from the upper surface side. It is the bottom view which looked at the eddy current fan arrange | positioned inside the casing provided in the inside of the said illuminating device, and the casing from the downward side. In both (a) and (b), the through-hole formed in the lower surface of the lighting device becomes a suction port or a discharge port due to the relationship between the protrusion formed on the inner peripheral surface of the casing and the rotational direction of the vortex fan. (A) is an explanatory view showing a state in which air enters and exits through a through hole formed on the lower surface of the lighting device, and (b) is a projection formed on the inner peripheral surface of the casing and the inside of the casing It is explanatory drawing which shows the flow of the air. It is explanatory drawing which shows inhalation of the air from the exterior to a casing inside, and discharge | emission of the air from the inside of a casing with respect to the bottom view which looked at the casing provided in the inside of the said illuminating device from the downward side. It is explanatory drawing which shows the flow of the air inside an illuminating device with respect to the longitudinal cross-sectional view of the said illuminating device. It is a longitudinal cross-sectional view of the illuminating device which is the other form of implementation of this invention. It is the disassembled perspective view which looked at the illumination main-body part in the illuminating device of another form from the lower surface side. It is the disassembled perspective view which looked at the illumination main-body part in the illuminating device of another form from the upper surface side. It is the bottom view which looked at the casing provided in the inside of the illuminating device of another form, and the axial fan arrange | positioned inside the casing from the downward side. It is explanatory drawing which shows the suction | inhalation of the air from the exterior to the inside of a casing, and the discharge | emission of the air from the inside of a casing with respect to the bottom view which looked at the casing provided in the inside of the illuminating device of another form from the downward side. is there. It is explanatory drawing which shows the flow of the air inside an illuminating device with respect to the longitudinal cross-sectional view of another illuminating device.

<First Embodiment>
Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  1 to 4 are each a diagram showing a lighting apparatus 100 according to the present embodiment. Among these, FIG. 1 is a longitudinal sectional view of the illumination device of the present embodiment. The lighting device is attached to the ceiling on the upper side in FIG. 2A and 2B are external views showing the external appearance of the lighting device, where FIG. 2A is an external view of the lighting device viewed from diagonally above, and FIG. 2B is an external view of the lighting device viewed diagonally below. FIG. FIG. 3 is an exploded perspective view of the illumination main body portion of the illumination device as viewed from the lower surface side, and FIG. 4 is an exploded perspective view of the illumination main body portion of the illumination device as viewed from the upper surface side.

  First, the external appearance of the illuminating device 100 is demonstrated using (a) (b) of FIG. As shown in FIGS. 2A and 2B, the illumination device 100 has a handbell shape that extends vertically, and is formed on the handbell-shaped illumination main body 30 and the upper surface of the illumination main body 30. And a mounting portion 32 having a rod-like connecting portion 31 extending from the hole.

  The illumination main body 30 includes a main body casing (outer member) 33 having a hand bell shape. The main body casing 33 has a rim 33a formed by processing a step on the opening end on the wide diameter side. And the circular LED support body (light source support body) 2 which consists of aluminum etc. is attached to the inner peripheral part of this rim | limb 33a so that the opening of the main body housing | casing part 33 may be plugged up.

  A plurality of LEDs 1 that are light sources of the illumination device 100 are attached to a surface (lower surface) facing the outside of the LED support 2. In addition, as a light source, it is not restricted to LED, Other things, such as EL, may be used. Here, several LED1 is attached to the inner peripheral side area | region except the outer peripheral part in the LED support body 2, and the outer peripheral part of the LED support body 2 is provided with the through-hole 10 used as a suction inlet or a discharge outlet. ing. The suction port is a hole for sucking air into the main body housing portion 33, and the discharge port is a hole for discharging air from the main body housing portion 33. Although details will be described later, the through-hole 10 has a relationship between the position of the protrusion formed on the inner peripheral surface of the casing 16 and the rotational direction of the vortex fan 17 disposed inside the casing 16. One of the inlets. In FIGS. 2A and 2B, description of a resin member 13 and a protective panel 12 (see FIG. 1), which will be described later, provided on the lower surface side of the LED support 2 is omitted.

  The attachment portion 32 is a fixing portion for attaching the lighting device 100 to a ceiling or the like, and is configured integrally with the rod-like connection portion 31. On the upper surface of the attachment portion 32, a wiring opening 34 for drawing electric wirings extending from the ceiling side into the lighting device 100 is formed.

  Next, the internal structure of the illumination device 100 will be described with reference to FIGS. 1, 3, and 4.

  Inside the main body casing 33 that is an outline of the illumination main body 30, the protective panel 12, the resin member 13, the LED support 2, the heat radiating member 15, the vortex fan 17, the casing 16, and the motor 20 are sequentially arranged from the lower surface side. A partition wall 21, a power supply substrate 25, a power supply substrate support 26, a connecting pipe 35, and the like are disposed.

  The protective panel 12 is disposed on the outermost surface of the lower surface of the lighting device 100, and the resin member 13 and the LED support 2 constitute an LED panel portion 11 having a three-layer structure. The protection panel 12 protects the lower surface of the lighting device 100 serving as a light emission surface, and is made of a light-transmitting resin panel or the like. The resin member 13 disposed on the upper surface side of the protection panel 12 protects the plurality of LEDs 1 attached to the LED support 2 from moisture and dust. The resin member 13 is formed with a mold 13b that matches the unevenness of the surface (lower surface) of the LED support 2 on which the LED 1 is attached, and covers the lower surface of the LED support 2 together with the LED 1 It is. Similarly to the protective panel 12, the resin member 13 is also made of a light transmissive resin material.

  As described above, the LED support 2 supports the plurality of LEDs 1. Here, LED1 consists of an LED module, and is individually mounted in the surface which faces the outer side of the LED support body 2, ie, a lower surface. In the present embodiment, the LED 1 is arranged in four blocks so as to draw a cross, with six arrays of 2 rows × 3 columns as one block. As LED1, white LED comprised in the package type for surface mounting, for example is used suitably.

  Further, although not shown in FIG. 4, the LED 1 mounted on the LED support 2 has a terminal drawn out on the upper surface which is the surface opposite to the mounting surface (lower surface) of the LED support 2. Wiring processing such as being connected in series with each other is performed.

  Further, the resin member 13 and the protection panel 12 laminated on the lower surface of the LED support 2 are formed with through holes 12a and 13a at positions corresponding to the through holes 10 formed in the LED support 2, respectively. Yes.

  The heat radiating member (heat sink) 15 disposed on the upper surface side of the LED support body 2 releases heat generated in the LED 1 into the air, and is disposed in contact with the upper surface of the LED support body 2. The heat dissipating member 15 can contact the upper surface of the LED support 2 to efficiently absorb heat generated by the LED 1 and transmitted to the LED support 2 from the LED support 2 to exchange heat with air. Moreover, in this Embodiment, the heat radiating member 15 has the several standing wall-shaped fin arranged in one direction, and each fin follows the air flow mentioned later (it becomes parallel to an air flow). Is arranged. Thereby, the cooling effect is further improved.

  A vortex fan 17 is disposed on the upper surface side of the heat dissipation member 15, and a bottomed cylindrical casing 16 is disposed so as to accommodate the vortex fan 17 inside thereof. The vortex fan 17 generates a vortex air flow (vortex) in a plane perpendicular to the rotation axis. More specifically, the casing 16 has a cup shape in which the upper surface is closed and the lower part is opened, and the diameter of the lower opening is wider than the diameter of the bottom forming the upper surface. The shape of the opening is circular.

  In a state where the casing 16 is installed on the upper surface side of the LED support 2, the LED 1 attached to the LED support 2 and all the through holes 10 formed in the outer peripheral portion of the LED support 2 are open to the casing 16. It is comprised so that it may be located inside. Thereby, air is sucked into the casing 16 from the partial through-hole 10 that acts as the suction port by the vortex of the vortex fan 17, while the inside of the casing 16 from the partial through-hole 10 that acts as the discharge port. Air is discharged, and an air flow that flows from the outside to the inside and from the inside to the outside is formed in the casing 16. Details will be described later. Hereinafter, a space in which the LED support 2 formed inside the casing 16 is disposed is referred to as a first space S1.

  A motor 20 that is a drive source for rotating the vortex fan 17 is installed on the upper surface side of the casing 16, and a partition wall 21 is disposed on the upper surface side of the motor 20. Further, four standing pillars 18 are installed on the upper surface of the casing 16 in order to secure an arrangement space for the motor 20 between the casing 16 and the partition wall 21.

  The partition wall 21 includes a first space S1 (see FIG. 1) in which the LED support 2 that supports the LEDs 1 is disposed, and a second space S2 in which the power supply substrate support 26 that supports the power supply substrate 25 is disposed. (See FIG. 2). The partition wall 21 partitions the first space S1 and the second space S2, and air (outside air) that flows into the first space S1 from the outside of the lighting device 100 flows into the second space S2. This is to prevent this. However, in the configuration of the present embodiment, as described above, the casing 16 includes the first space S1 in which the LED support 2 is disposed and the second space in which the power board support 26 is disposed. Since it functions as a partition wall for partitioning, the partition wall 21 corresponds to a second partition wall. In other words, in the configuration of the present embodiment, the casing 16 and the partition wall 21 prevent the air that has flowed into the first space S1 from the outside of the lighting device 100 from flowing into the second space S2. Yes.

  The casing 16 and the partition wall 21 are ideally configured such that no air that flows into the first space S1 from the outside of the lighting device 100 flows into the second space S2, but flows into the first space S1. The inflow of a part of the air that has been performed to the second space S2 may be prevented.

  The power supply board 25 supplies electric power to the LED 1 and the motor 20, and is also a control board that performs lighting control of the LED 1 and drive control of the motor 20 to drive the vortex fan 17. In the present embodiment, the power supply board 25 that performs the lighting control of the LED 1 and the drive control of the motor 20 is integrally configured. However, the power supply board that performs the lighting control of the LED 1 and the drive control of the motor 20 is separately provided. It may be provided.

  On the upper surface side of the partition wall 21, a power supply substrate support 26 having a hollow structure extending in the vertical direction is disposed, and a plurality of power supply substrates 25 are attached around the power supply substrate support 26. In the present embodiment, the power supply substrate support 26 is combined with four resin molding plates while ensuring a space on the inside to form a hollow square tube shape, and the power supply substrate 25 is attached to the four outer surfaces. It has been.

  In the internal space opened above and below the power supply substrate support 26, the electrical wiring connecting the power supply substrate 25 and the electrical wiring extending from the ceiling side drawn into the lighting device 100, the power supply substrate 25, the LED 1, and the motor Electrical wiring for connecting 20 etc. is passed.

  Note that the shape of the power supply substrate support 26 is not limited to the rectangular cylinder shape, and may be any cylindrical shape through which the electrical wiring can be inserted. Further, in the present embodiment, the power supply board 25 is attached to the four peripheral surfaces of the power supply board support 26, but the attachment position of the power supply board 25 is not limited to this and is the inner peripheral surface of the main body housing portion 33. Also good. That is, the power supply board 25 may be disposed in a space between the outer peripheral surface of the power supply substrate support 26 and the inner peripheral surface of the main body housing portion 33.

  In addition, a lower end portion of a connecting pipe 35 that is an internal component of the attachment portion 32 provided on the upper portion of the illumination main body portion 30 is also inserted into the internal space above the power supply substrate support body 26, and the electricity extending from the ceiling side is inserted. Wirings are drawn into the illumination main body 30 through the inside of the connecting pipe 35.

  On the outer peripheral surface on the lower end side of the connecting tube 35, a hook-shaped fixing member 36 for fixing the connecting tube 35 and the illumination main body 30 is provided. The connecting pipe 35 is inserted into the inside of the main body housing portion 33 through the opening on the lower surface side, and the hook-shaped fixing member 36 and the main body housing are in contact with the upper surface of the main body housing portion 33. The upper surface of the part 33 is fixed to the main body housing part 33. Further, the connecting pipe 35 is inserted into the attachment portion 32 through the inside of the rod-like connection portion 31, and is fixed to the attachment portion 32. The illumination main body 30 and the attachment portion 32 are connected via a connecting tube 35.

  Next, the flow of air in the lighting device 100 will be described with reference to FIGS. FIG. 5 is a bottom view of a casing provided inside the lighting device and a vortex fan arranged inside the casing as seen from below. 6 (a) and 6 (b) show that the through hole formed in the lower surface of the lighting device has a suction port or a discharge port depending on the relationship between the protrusion formed on the inner peripheral surface of the casing and the rotational direction of the vortex fan. It is drawing for showing that it becomes an exit, (a) is an explanatory view showing signs that air enters and exits from a through hole formed in the lower surface of the lighting device, and (b) is formed on the inner peripheral surface of the casing. It is explanatory drawing which shows the protrusion and the flow of the air inside a casing. FIG. 7 is an explanatory view showing the suction of air from the outside to the inside of the casing and the discharge of air from the inside of the casing with respect to the bottom view of the casing provided inside the lighting device from the lower side. is there. FIG. 8 is an explanatory diagram showing the flow of air inside the lighting device with respect to the longitudinal sectional view of the lighting device.

  As shown in FIG. 5, a pair of discharge protrusions 19 a are formed on the inner peripheral surface of the casing 16 so as to face each other at opposing positions. Further, a pair of discharge protrusions 19a are formed on the inner peripheral surface of the casing 16 so as to face each other at opposing positions shifted from each discharge protrusion 19a by about 90 ° in the circumferential direction. Here, the discharge protrusion 19a protrudes toward the rotation center X from the rectification protrusion 19b. Therefore, when the vortex fan 17 is driven to rotate, the blades 17a constituting the vortex fan 17 rotate in a state where the tips of the blades 17a are close to the discharge protrusion 19a as if they contact the discharge protrusion 19a. On the other hand, with respect to the rectifying protrusion 19b, each blade 17a rotates in a state where a space through which air flows is separated between the tip thereof and the rectifying protrusion 19b.

  In FIG. 5, when the direction of rotation of the vortex fan 17 is the direction of the arrow Z1, in the space located in the second quadrant of the xy coordinates with the rotation center X as the origin, the outside of the through-hole 10 is caused by the rotation of the blade 17a. The air is inhaled. That is, the through hole 10 in the second quadrant becomes the suction port 10a shown in FIG.

  The sucked air moves to the third quadrant as the blades 17a rotate. When moving to the third quadrant, the blade 17a passes near the rectifying protrusion 19b, but is sucked in because a space for air to flow is secured between the tip of the blade 17a and the rectifying protrusion 19b. Air can pass through the space.

  In the space located in the third quadrant, air is carried along with the rotation of the blade 17a, but the air pressure increases as the tip of the previous blade 17a (with respect to the rotation direction) approaches the discharge projection 19a. When the tip of the blade 17a moves to a position facing the discharge projection 19a, the air pressure becomes the highest. Therefore, air is discharged to the outside through the through hole 10 located in the first quadrant. That is, the through hole 10 in the third quadrant becomes the discharge port 10b shown in FIG.

  In each space located in the fourth quadrant and the first quadrant, air is sucked and discharged in the same manner as in each space where the second quadrant and the third quadrant are located. The air suction force and discharge force from the through hole 10 in each space are stronger as they are closer to the discharge protrusion 19a.

  As shown in FIGS. 6 (a) and 6 (b), the lighting device 100 has left and right sides as seen from the lower surface by sucking and discharging air in each space located in the first to fourth quadrants. The air flows in two opposite directions indicated by arrows 40 are formed. The flow of air indicated by the arrow 40 is the first flow without the air flowing from the outside of the lighting device 100 entering the first space S1 in which the LED support 2 is disposed, toward the second space S2. A casing 16 having a function as a partition contributes to the formation of such a flow, which acts in the space S1 and is discharged to the outside of the lighting device 100. Hereinafter, the air flow that flows into the first space S1 from the outside of the lighting device 100 and discharges from the first space S1 to the outside of the lighting device 100 will be referred to as a first air flow 40.

  6 (a) and 6 (b), for convenience, it is described that the air is moving in the plane, but in actuality, the air was sucked from the suction port 10a provided on the lower surface of the lighting device 100. Since the air also moves in the height direction inside the casing 16 and is discharged from the opposite discharge port 10b formed on the lower surface of the lighting device 100, the first air flow 40 has a width in the vertical direction. Is also a good thing.

  Further, when the first air flow 40 formed in this way is represented by a large flow including the vortex flow caused by each blade 17a of the vortex fan 17, the flow is as shown by a thick arrow 40 in FIG. That is, in the casing 16, the first air that draws an arc in a direction opposite to the rotation direction of the vortex fan 17 (motor 20) in two spaces divided by a line segment connecting the opposing discharge protrusions 19 a. A stream 40 is formed.

  Thus, in the above configuration, the vortex fan 17 allows air to flow into the first space S1 in which the LED support 2 is disposed from the outside of the lighting device 100, and the air that has flowed in from the first space S1. A first air flow 40 that is discharged to the outside of the lighting device 100 is formed, and the casing 16 (or the casing 16 and the partition wall 21) includes a first space S1 and a second space S2 in which the power supply substrate support 26 is disposed. The air that has flowed into the first space S1 is prevented from flowing into the second space S2.

  Thereby, the heat generated in the LED 1 and transmitted to the LED support 2 and the heat radiating member 15 can be efficiently taken and cooled by the first air flow 40, and the temperature rise of the LED 1 can be suppressed. . Note that the heat dissipation member 15 is not necessarily provided, and the air flowing into the first space may be configured to flow directly on the upper surface of the LED support 2.

  In addition, the casing 16 prevents the air in the first space S1 heated by taking away the heat generated in the LED 1 from flowing into the second space S2 and is discharged from the discharge port 10b. It is possible to suppress heat from being transmitted to the power supply substrate 25. Thereby, the temperature rise of the power supply board 25 can also be suppressed. Here, even if the casing 16 cannot prevent all the air in the first space S1 from flowing into the second space S2, the partition 21 provided thereon prevents the inflow again. Therefore, the inflow of air from the first space S1 to the second space S2 can be effectively prevented.

  Furthermore, in the present embodiment, as indicated by an arrow 43 in FIG. 8, an air flow (axial flow) that flows from the top to the bottom inside the illumination device 100 is also formed. This is because the air in the second space S <b> 2 is drawn into the casing 16 by the rotation of the vortex fan 17 through the wiring hole provided in the casing 16. The wiring hole provided in the casing 16 is a hole through which electric wirings for connecting the plurality of LEDs 1 installed inside the casing 16 and the power supply board 25 are passed. Hereinafter, the air flow from the outside of the lighting device 100 that flows into the second space S <b> 2 as indicated by the arrow 43 is referred to as a second air flow 43.

  By forming such an axial flow-like second air flow 43, a power supply substrate in which air from the outside flowing on the inner peripheral surface of the power supply substrate support 26 is conducted to the power supply substrate support 26. The heat of 25 can be effectively radiated, and the temperature rise of the power supply substrate 25 can be further suppressed.

  Furthermore, the vortex fan 17 forms a second air flow 43 that flows from the top to the bottom (the direction toward the first space S1) in the second space S2, so that the second air flow 43 itself is Since the first air flow 40, which is a reverse flow, serves as a barrier that prevents the first air flow 40 from flowing into the second space S2, air deprived of the heat of the LED 1 flows into the second space S2, and the heat of the LED 1 enters the power supply board 25. Can be more reliably prevented from being transmitted.

  In the present embodiment, air in the second space S2 is drawn into the casing 16 from the hole through which the electrical wiring provided in the casing 16 passes, so that the atmospheric pressure in the main body housing portion 33 decreases, Air is sucked from the wiring openings 34 for drawing in the electrical wirings extending from the ceiling side. The sucked air passes through the inside of the connecting pipe 35 and the power supply substrate support 26 and is sucked into the casing 16 and discharged from the discharge port 10b. That is, in the present embodiment, the air from the outside of the lighting device 100 drawn into the second space S2 is drawn into the casing 16, merged with the first air flow 40, and discharged from the discharge port 10b. ing.

  However, it is more preferable that the external air drawn into the second space S <b> 2 is discharged from another discharge hole provided outside the casing 16. By adopting a preferable configuration, the first air flow 40 that cools the LED 1 is not mixed with the second air flow 43 that is heated by taking the heat of the power supply board 25, so that the cooling effect of the LED 1 can be further enhanced. it can.

  Furthermore, in this Embodiment, the suction inlet 10a or the discharge outlet 10b is provided in the same surface as the support surface of LED1 in the LED support body 2. As shown in FIG. Thereby, there exists an effect that LED1 can be cooled quickly and effectively. That is, by providing the suction port 10a and the discharge port 10b on the same surface as the surface supported by the LED 1, air taken from the outside of the lighting device 100 that does not take heat away from the heat source such as the LED 1 or the power supply board 25 is supported by the LED support. Therefore, the heat generated from the LED 1 can be efficiently dissipated. In addition, since the air deprived of heat generated from the LED 1 can be immediately discharged (immediately after it is deprived), the effect of preventing the inflow of air into the second space S2 can be further enhanced.

  Moreover, in this Embodiment, the through-hole 10 used as the suction inlet 10a or the discharge outlet 10b is provided in the lower surface of the illuminating device 100. FIG. In the illuminating device 100, the LED 1 illuminates the floor surface, and thus is disposed downward. That is, in the said structure, since the suction inlet 10a and the discharge outlet 10b are provided in the lower surface of the illuminating device 100, it is hard to inhale rain and dust. Thereby, failure of LED1 by adhesion of rain or dust can be controlled.

  Further, as described above, in the present embodiment, the second air flow 43 that radiates heat from the power supply board 25 is formed so as to pass through the inside of the power supply board support body 26 having a rectangular tube shape. Therefore, the power supply board 25 arranged inside the main body housing portion 33 and outside the power supply board support body 26 is cooled through the power supply board support body 26 without being directly exposed to the second air flow 43. Will be. Thereby, even if dust such as dust is sucked together with air from the wiring opening 34 and dust or dust is mixed in the second air flow 43, it is possible to prevent them from adhering to the power supply board 25. It is possible to prevent a failure of the power supply board 25 due to the adhesion of the dust.

  In the lighting device 100, the entire periphery of the LED support 2 is supported by the rim 33 a portion of the main body housing portion 33. However, when there is a possibility that the heat of the LED support 2 is transmitted to the power supply board 25 through the main body casing 33, the periphery of the LED support 2 is partially supported by the rim 33a portion of the main body casing 33. It is preferable to adopt a configuration in which

<Second Embodiment>
Hereinafter, other preferred embodiments of the present invention will be specifically described with reference to the drawings. For convenience of explanation, members having the same functions as those used in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  9 to 12 are each a diagram showing a lighting apparatus 101 according to the present embodiment. Among these, FIG. 9 is a longitudinal sectional view of the illumination device of the present embodiment. The lighting device is attached to the ceiling on the upper side in FIG. FIG. 10 is an exploded perspective view of the illumination main body portion of the illumination device as seen from the lower surface side, and FIG. 11 is an exploded perspective view of the illumination main body portion of the illumination device as seen from the upper surface side. FIG. 12 is a bottom view of the casing provided inside the lighting apparatus as seen from below.

  The difference between the illuminating device 101 of this Embodiment and the illuminating device 100 of 1st Embodiment exists in the difference of the fan which forms an airflow. In the illuminating device 100 of 1st Embodiment, the eddy current fan 17 which generates a vortex | eddy_current in the surface perpendicular | vertical to a rotating shaft was used. On the other hand, in the illuminating device 101 of this Embodiment, the axial fan 56 is used. The axial fan 56 is called a propeller fan, and generates an axial air flow (axial flow) in the axial direction of the rotating shaft. The axial fan 56 is installed so that an axial flow is formed from the top to the bottom of the lighting device 101.

  Due to the difference between the fans (air flow generators) used in this way, the lighting device 101 includes a casing 57, a partition wall 55, and a pedestal portion 58 instead of the casing 16, the partition wall 21, and the upright column 18 in the lighting device 100. Yes. Only differences from the illumination device 100 will be described below.

  The axial fan 56 is disposed on the upper surface side of the heat radiating member 15, and a casing 57 is disposed on the upper surface side of the axial fan 56 so as to accommodate the axial fan 56 inside thereof. Unlike the casing 16 corresponding to the vortex fan 17, the casing 57 has an opening 57 a on the upper surface as shown in FIG. 12. The axial fan 56 is disposed below the opening 57a. More specifically, the casing 57 has a shape in which the opening of the cup is wider than the upper surface where the opening 57a is formed, and the lower opening like the casing 16 is not a cup type having a circular shape, but is shown in FIG. Thus, the outer periphery of the cup is processed so as to partially enter the inside. As a result, the opening below the casing 57 has a shape resembling a four-leaf clover whose circular shape is partially recessed inward. As described above, the shape of the indented part is formed by positioning a part of the through hole 10 formed in the outer peripheral part of the LED support 2 inside the opening of the casing 57 and a part of the through hole 10. This is for positioning outside the casing 57.

  In the present embodiment, as shown in FIG. 12, the longer through-hole 10 is positioned inside the opening of the casing 57, and the shorter through-hole 10 is formed outside the casing 57. It is comprised so that it may be located in.

  Thereby, the through hole 10 arranged outside the casing 57 becomes the suction port 10a, and the through hole 10 arranged inside the casing 57 becomes the discharge port 10b. Note that, like the lighting device 100, all the LEDs 1 are located inside the casing 57.

  9 to 11 again, a partition wall 55 is provided on the upper surface side of the casing 57 via a pedestal portion 58 in place of the upright column 18. The partition wall 55 separates the LED space in which the LED 1 is disposed from the power supply substrate space in which the power supply substrate 25 is disposed, and the partition wall 55 of the lighting device 100 in which the casing 16 functions as the partition wall. In comparison, the performance of separating both spaces is high.

  10 and 11 exemplify a protective panel 12A disposed on the outermost surface of the lower surface of the lighting device 101, in which a lens 12c corresponding to the LED 1 is formed.

  Next, the flow of air in the lighting device 101 will be described with reference to FIGS. 13 and 14. FIG. 13 is an explanatory view showing the suction of air from the outside to the inside of the casing and the discharge of air from the inside of the casing with respect to the bottom view of the casing provided inside the lighting device as viewed from below. is there. FIG. 14 is an explanatory diagram showing the flow of air inside the lighting device with respect to the longitudinal sectional view of the lighting device.

  When the axial fan 56 is rotationally driven inside the casing 57, a flow that draws air into the casing 57 from the opening 57 a on the upper surface of the casing 57 is generated. Thereby, as shown by an arrow 45 in FIG. 14, air (outside air) is sucked into the main body housing portion 33 using the through hole 10 located outside the casing 57 as the suction port 10a. The sucked air enters the upper surface from the outside of the casing 57 and enters the inside of the casing 57 from the opening 57a on the upper surface. The air that has entered the inside of the casing 57 is discharged through the through hole 10 located inside the casing 57 as the discharge port 10b. As shown in FIG. 13, the air suction from the suction port and the air discharge from the discharge port are performed in four directions in the configuration of the present embodiment.

  The air flow indicated by the arrow 45 causes the intake air to flow into the first space S1 in which the LED support 2 is disposed from the outside of the lighting device 101, and the introduced air travels toward the second space S2. It is the 1st air flow 45 which acts in 1st space S1, and is discharged | emitted outside the illuminating device 101, and the partition 55 contributes to formation of such a flow.

  As described above, in the above configuration, the axial fan 56 discharges the air flowing from the outside of the lighting device 101 into the first space S1 in which the LED support 2 is disposed, from the first space S1 to the outside. 1 and the partition wall 55 partitions the space between the first space S1 and the second space S2 in which the power supply substrate support 26 is disposed, and flows into the first space S1 from the outside. Is prevented from flowing into the second space S2.

  Therefore, the heat generated in the LED 1 and transmitted to the LED support 2 and the heat radiating member 15 can be efficiently taken by the first air flow 45 and cooled, and the temperature rise of the LED 1 can be suppressed. As in the first embodiment, the heat dissipation member 15 is not essential.

  Further, since the partition wall 55 is provided, the air in the first space S1 that has been warmed by taking away the heat generated in the LED 1 is prevented from flowing into the second space S2, so that the heat of the LED 1 is transferred to the power supply board. 25 can be prevented. Thereby, the temperature rise of the power supply board 25 can also be suppressed. As in the first embodiment, it is preferable that the partition wall 55 can prevent the inflow of all the air in the first space S1 into the second space S2, but may prevent a part of the inflow. .

  Also in the present embodiment, as indicated by an arrow 46 in FIG. 14, an air flow (axial flow) that flows from the top to the bottom inside the illumination device 101 is also formed. As in the casing 16 in the lighting apparatus 100 according to the first embodiment, this is a slight amount, but the air in the main body housing portion 33 is supplied to the axial fan through the wiring hole provided in the partition wall 55. This is because it is drawn into the LED space at 56 rotations. The air flow indicated by the arrow 46 forms a second air flow 46 that is the air flow that flows into the second space S2 from the outside of the lighting device 101.

  By forming such an axial flow-like second air flow 46, a power supply substrate in which air from the outside flowing through the inner peripheral surface of the power supply substrate support 26 is conducted to the power supply substrate support 26. The heat of 25 can be effectively radiated, and the temperature rise of the power supply substrate 25 can be further reduced.

  Furthermore, the axial air fan 56 forms the second air flow 43 that flows from the top to the bottom (the direction toward the first space S1) in the second space S2, so that the second air flow 46 itself is generated. Since the first air flow 45, which is a reverse flow, serves as a barrier to prevent the first air flow 45 from flowing into the second space S2, air deprived of the heat of the LED 1 flows into the second space S2 and enters the power board 25 into the power supply board 25. It can prevent more reliably that heat is transmitted.

  In the present embodiment, as the casing 57, a casing in which an opening 57a is formed on the upper surface serving as the bottom surface of the cup and the outer periphery of the cup partially enters inside is illustrated.

  However, the casing of the axial fan only needs to be cylindrical, and it is only necessary that all of the plurality of LEDs 1 and a part of the through hole 10 serving as an exhaust hole are located inside the opening of the cylindrical casing. .

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

1 LED (light source)
2 LED support (light source support)
DESCRIPTION OF SYMBOLS 10 Through-hole 10a Suction port 10b Discharge port 11 LED panel part 12, 12A Protection panel 13 Resin member 15 Heat radiation member 16 Casing (partition wall)
17 Eddy current fan (air flow generator)
17a Blade 18 Standing column 19a Discharge protrusion (protrusion)
19b Rectification projection 20 Motor 21 Bulkhead 25 Power supply board 26 Power supply board support 30 Illumination main body 31 Rod-like connection part 33 Main body casing (outer member)
33a Rim 34 Wiring opening 35 Connecting pipe 36 Saddle-shaped fixing member 40 First air flow 43 Second air flow 45 First air flow 46 Second air flow 55 Partition (partition)
56 Axial flow fan (air flow generator)
57 Casing 57a Opening 100 Illuminating device 101 Illuminating device LED White S1 First space S2 Second space X Center of rotation Z1 Arrow

Claims (5)

A light source;
A light source support that supports the light source and is provided with a plurality of through holes;
An airflow generator for forming an airflow;
A bottomed cylindrical casing in which the airflow generator is disposed;
The casing is disposed so as to face the light source support so that at least a part of the plurality of through holes is located inside an opening of the casing.   The plurality of through holes are air suction ports or air discharge ports for forming an air flow, respectively, and are formed on the same surface as a surface on which the light source of the light source support is supported. The lighting device according to claim 1. The air flow generator is a vortex fan that generates an air flow in a plane perpendicular to the rotation axis,
The lighting device according to claim 1, wherein the casing is formed with a plurality of protrusions adjacent to a tip of a blade of the vortex fan on an inner peripheral surface. The air flow generator is an axial fan that generates an air flow in the axial direction of the rotary shaft,
The casing is disposed to face the light source support so that a part of the plurality of through holes is located inside the opening of the casing and the other part is located outside the opening. The lighting device according to claim 1, wherein the lighting device is provided. A power supply board for supplying power to the light source;
A power supply substrate support that supports the power supply substrate and is disposed outside the casing;
The lighting device according to any one of claims 1 to 4, wherein the casing is provided with a hole through which a wiring connecting the power supply substrate and the light source is passed.