WO2019012702A1 - Illumination system - Google Patents

Abstract

This illumination system is provided with a terminal device (60) that is configured such that a user can remotely operate an illumination device (1A). The illumination device (1A) comprises: a light source (17) having light source elements (3); a heat sink (2, 4); and a control means (7e) that drives the light source (17) and a cooling fan (6). If at least one of an event related to a fault in the cooling fan (6), an event related to the lifespan of the cooling fan (6), and an event related to the service life of the light source (17) occurs, the control means (7e) at least temporarily turns on the light source (17) in notification lighting mode instead of normal lighting mode. The notification lighting mode and the normal lighting mode are visually distinguishable by a person. The terminal device (60) can receive an operation to turn off the notification lighting mode.

Description

Lighting system

The present invention relates to a lighting system.

Lighting devices using light emitting elements such as light emitting diodes (LEDs) are widely used. When the temperature of the light emitting element is increased due to the heat generation of the light emitting element, the energy efficiency may be reduced or the life of the light emitting element may be shortened. Therefore, in order to prevent the temperature of the light emitting element from rising, it is desired to improve the heat dissipation property to dissipate the heat of the light emitting element. In particular, high ceiling illumination devices installed on high ceilings, such as factories, warehouses, gymnasiums, and competition facilities, are placed in high temperature environments, so cooling of light emitting elements becomes more important. Therefore, a technique has been proposed in which a cooling fan is provided to dissipate heat from the heat sink more efficiently.

Patent Document 1 below discloses a lighting device as described below. In addition, the code | symbol in patent document 1 is shown in a parenthesis. The optical semiconductor lighting device (1000) comprises a heat sink (300), a fan (400), and a light source module (500). The lighting control unit (820) reports a failure of the fan (400) if it is determined that the fan (400) has failed due to the fact that the fan (400) can not be driven properly despite the power being supplied. The light source module (500) can be controlled to generate light of any color, for example red, or the light semiconductor element (520) of the light source module (500) can be driven to flash.

Japanese Patent Application Laid-Open No. 2013-016520

In the prior art described above, when it is determined that the cooling fan has failed, the illumination light turns red or the illumination blinks. Such an abnormal lighting condition interferes with the use of the illuminated space.

The present invention has been made to solve the problems as described above, and is capable of detecting an event related to at least one of a cooling fan and a light source unit of a lighting device, and lighting even after the event is detected. The purpose is to provide a lighting system that enables continuous use of space.

A lighting system according to the present invention includes a lighting device and a terminal device configured to allow a user to remotely control the lighting device. The lighting device includes a light source unit having a light emitting element, and a light source unit. A heat sink for dissipating heat, a cooling fan for generating an air flow for cooling the heat sink, and a control means for driving the light source unit and the cooling fan, an event related to a failure of the cooling fan, an event related to the life of the cooling fan, and the light source When at least one of the events related to the service life of the unit occurs, the control means at least temporarily turns on the light source unit in the notification lighting mode instead of the normal lighting mode, and the notification lighting mode and the normal lighting The mode can be identified by human vision, and the terminal device can accept an operation for releasing the notification lighting mode. It is.

According to the present invention, it is possible to detect a specific event related to at least one of the cooling fan and the light source unit of the lighting device, and to continue using the illuminated space even after the specific event is detected. .

It is the perspective view which looked at the illuminating device with which the illumination system by Embodiment 1 is equipped from diagonally upward. It is the perspective view which looked at the illuminating device shown in FIG. 1 from diagonally downward. It is a cross-sectional perspective view of the illuminating device shown in FIG. FIG. 1 is a functional block diagram of a lighting system according to a first embodiment. It is a figure which shows the relationship between the light beam which a light emitting element emits, light source current, and light source temperature. 5 is a flowchart showing processing performed by a control unit of a lighting device in Embodiment 1. FIG. It is a figure which shows the 1st example of a change of the light source current at the time of alerting | reporting lighting mode. It is a figure which shows the 2nd example of a change of the light source current at the time of alerting | reporting lighting mode. It is a figure which shows the 3rd example of a change of the light source current at the time of alerting | reporting lighting mode. It is the perspective view which looked at the illuminating device with which the illumination system by Embodiment 2 is equipped from diagonally upward.

Hereinafter, embodiments will be described with reference to the drawings. The same or corresponding elements in the drawings are denoted by the same reference numerals, and redundant description will be simplified or omitted. The present disclosure can include any combination of configurations that can be combined among the configurations described in the following embodiments.

Embodiment 1
FIG. 1 is a perspective view of a lighting device 1A provided in the lighting system according to the first embodiment as viewed obliquely from above. FIG. 2 is a perspective view of the lighting device 1A shown in FIG. 1 as viewed obliquely from below. FIG. 3 is a cross-sectional perspective view of the lighting device 1A shown in FIG. FIG. 4 is a functional block diagram of the illumination system according to the first embodiment. The illuminating device 1A shown in FIGS. 1 to 3 can be preferably used for applications that illuminate a space below the illuminating device 1A by being installed on a ceiling and irradiating light downward. In the following description, the upper and lower directions are specified with reference to the posture when the lighting device 1A is used. The lighting device 1A can be suitably used as a device that emits a light flux of, for example, several thousand lumens to several tens of thousands lumens. The lighting device 1A is particularly suitable for use by being installed on a high ceiling of a factory, a warehouse, a gymnasium, a competition facility or the like.

The lighting device 1A includes a first base 2, a light emitting element 3, a radiation fin 4, a second base 5, a cooling fan 6, and a power supply 7. The first base 2 has a substantially plate-like shape as a whole. The first base 2 has an upper surface and a lower surface. When the lighting device 1A is used, the upper and lower surfaces of the first base 2 become substantially horizontal. The shape of the first base 2 when viewed from the direction perpendicular to the first base 2 in the present embodiment is a rectangle or a square. The first base 2 has a rib 2a formed on the edge. The rib 2 a protrudes vertically upward with respect to the upper surface of the first base 2. By providing the ribs 2a, the strength and rigidity of the first base 2 can be improved.

As shown in FIG. 2, the plurality of light emitting elements 3 are disposed under the first base 2. The light emitting element 3 emits light downward from the lighting device 1A. The light emitting element 3 in the present embodiment includes a light emitting diode (LED). The light emitting element 3 is provided to be able to conduct heat to the lower surface of the first base 2. The heat generated by the light emitting element 3 is thermally conducted to the first base 2. The light emitting element 3 may be in contact with the lower surface of the first base 2 via a thermally conductive material. The upper surface of the light source substrate (not shown) in which the light emitting elements 3 are mounted on the lower surface may be in contact with the lower surface of the first base 2 directly or through a thermally conductive material. The thermally conductive material may be, for example, thermally conductive grease, a thermally conductive sheet, a thermally conductive adhesive, or a thermally conductive double-sided pressure-sensitive adhesive tape. The light source substrate on which the light emitting element 3 is mounted and the first base 2 may be integrally formed.

The light emitting element 3 in the present embodiment is a chip on board (COB) type LED light source. In the present embodiment, the following effects can be obtained by using the COB type LED light source as the light emitting element 3. The mounting area of the LED can be reduced, and the size of the lighting device 1A can also be reduced. As a result, the entire lighting device 1A can be reduced in size and weight. A plurality of blue-based LED bare chips may be disposed, and a white-emitting COB type LED light source sealed with a yellow-based phosphor mixed resin material may be used as the light-emitting element 3.

Needless to say, in the present invention, the light emitting element 3 may not be a COB type LED light source, and other various types may be used. For example, the light emitting element 3 may be a surface mount type LED package, a shell type LED package, an LED package with a light distribution lens, or a chip scale package LED. Disposing the plurality of LED packages necessary to obtain a desired luminous flux is advantageous for suppressing the rise of the light source temperature, and a more efficient lighting device 1A can be obtained. Further, the light emitting element 3 is not limited to one including an LED, and may be one including an organic electroluminescent (EL) element, a semiconductor laser, or the like, for example.

As shown in FIGS. 1 and 3, a plurality of radiation fins 4 are disposed on the first base 2. The first base 2 and the radiation fin 4 cool the light emitting element 3 by dissipating the heat generated by the light emitting element 3 to the surrounding air. The first base 2 and the radiation fin 4 correspond to a heat sink. The radiation fin 4 protrudes from the top surface of the first base 2. The radiation fin 4 is perpendicular to the top surface of the first base 2. The radiation fin 4 in the present embodiment has a plate-like shape. A plurality of radiation fins 4 are arranged in parallel to one another. Instead of the illustrated configuration, the heat dissipating fins 4 may be pin fins having a pin shape. The heat generated by the light emitting element 3 is thermally conducted to the first base 2 and further conducted to the radiation fin 4 from the first base 2. Heat is dissipated from the surfaces of the first base 2 and the heat dissipating fins 4 to the ambient air. By increasing the surface area of the heat sink by the first base 2 and the heat dissipating fins 4, the heat generated by the light emitting element 3 can be efficiently dissipated. As a result, since the temperature of the light emitting element 3 can be lowered, the energy efficiency of the light emitting element 3, that is, the luminous efficiency can be improved, and the life of the light emitting element 3 can be extended. Alternatively, a heat pipe may be provided to transfer heat from the first base 2 to the heat dissipating fins 4.

It is desirable that the first base 2 and the heat dissipating fins 4 be made of a lightweight and high thermal conductivity metal material. As such a metal material, aluminum, an aluminum-type alloy, a copper-type alloy, stainless steel etc. are mentioned, for example. The radiation fin 4 of the present embodiment is made by bending sheet metal. Thereby, weight reduction can be achieved. The method of fixing the radiation fin 4 to the first base 2 may be any method, for example, caulking, screwing, bonding, welding, brazing and the like. Further, the first base 2 and the radiation fin 4 may be integrally formed by, for example, a die casting method.

The second base 5 is disposed on the plurality of radiation fins 4. The second base 5 in the present embodiment has a plate-like shape as a whole. As a modification, at least a part of the second base 5 may have a shape other than a plate shape, for example, a lattice shape. The second base 5 covers the tops of the plurality of radiation fins 4 without contacting the plurality of radiation fins 4. According to the present embodiment, the following effects can be obtained by providing the second base 5. When the second base 5 receives dust or oil falling from the top of the lighting device 1A, dirt and dirt consisting of dust or oil adheres and deposits on the upper surface of the first base 2 and the surfaces of the plurality of radiation fins 4 It can prevent. It is possible to reliably reduce the decrease in the heat radiation efficiency of the first base 2 and the heat radiation fins 4 due to the influence of the contamination. When the lighting apparatus 1A is installed at a high place such as a ceiling, it is difficult to perform frequent cleaning of the first base 2 and the radiation fins 4. Second, the dirt may be deposited on the upper surface of the first base 2 and the first base 2 of the radiation fin 4 and the surfaces of the plurality of radiation fins 4 without frequent cleaning of the first base 2 and the radiation fin 4 This can be prevented by the base 5.

In the present embodiment, the second base 5 substantially covers the entire first base 2 when viewed from above. The second base 5 is located parallel to the first base 2. When the lighting device 1A is used, the second base 5 is substantially horizontal. The lower surface of the second base 5 faces the upper surface of the first base 2 via the plurality of heat radiation fins 4. The shape of the second base 5 as viewed from above in the present embodiment is a rectangle or a square. The second base 5 has ribs 5a and 5b formed on the edge. The ribs 5 a and 5 b protrude vertically downward with respect to the lower surface of the second base 5. By providing the ribs 5a and 5b, the strength and rigidity of the second base 5 can be improved.

A first vent 8 and a second vent 9 are formed between the first base 2 and the second base 5. A plurality of radiation fins 4 are located between the first vent 8 and the second vent 9. The cooling fan 6 generates an air flow for cooling the first base 2 and the radiation fins 4. The cooling fan 6 is disposed to face the first vent 8. The first vent 8 and the second vent 9 are opposite to each other via the plurality of heat dissipating fins 4. The surface of each radiation fin 4 is parallel to the direction connecting the first vent 8 and the second vent 9. In the present embodiment, the cooling fan 6 is an axial fan having a propeller fan and a motor for rotating the propeller fan. The center line of the cooling fan 6 is parallel to the first base 2 and the second base 5. The rotation axis of the propeller fan of the cooling fan 6 is parallel to the first base 2 and the second base 5. The direction in which the air flow is blown out from the cooling fan 6 is parallel to the first base 2 and the second base 5. The lower end of the cooling fan 6 is at substantially the same height as the first base 2. The upper end of the cooling fan 6 is at substantially the same height as the second base 5.

The power supply 7 is fixed to the second base 5. The power supply device 7 includes a light source drive circuit 7 a that supplies a current for lighting the light emitting element 3 and a fan drive circuit 7 b that supplies a current for driving the cooling fan 6. As shown in FIG. 3, the power supply device 7 includes an electronic circuit board 7 c and a power supply housing 7 d. An electronic circuit board 7c is housed in the power supply housing 7d. The power supply housing 7d has a substantially rectangular parallelepiped shape. The electronic circuit board 7c includes, for example, a heat generating electrical component such as a semiconductor element, a reactor, a resistor, or a capacitor. A light source drive circuit 7a and a fan drive circuit 7b are configured by the electronic circuit board 7c. As a modification, the electronic circuit board of the light source drive circuit 7a and the electronic circuit board of the fan drive circuit 7b may be separated. As another modification, a fan drive circuit 7 b may be installed inside the cooling fan 6.

The bottom of the power supply 7 is supported by the second base 5. The bottom surface of the power supply housing 7 d is in contact with the top surface of the second base 5. The bottom surface of the power supply housing 7 d may be in contact with the top surface of the second base 5 via a thermally conductive material. The thermally conductive material is similar to that described above. As a modification, the bottom surface of the power supply housing 7 d may be integrated with the second base 5. The heat generated from the electrical components of the power supply device 7 is transmitted to the power supply housing 7d and dissipated from the surface of the power supply housing 7d to the ambient air. Part of the heat transferred to the power supply housing 7 d is further conducted to the second base 5 and dissipated to the air from the surface of the second base 5, in particular, the lower surface of the second base 5. By cooling the power supply 7 in this manner, it is possible to prevent the efficiency of the power supply 7 from being reduced.

When the cooling fan 6 is operated, the following occurs. The air flow generated by the cooling fan 6 passes through the first vent 8 and the second vent 9. The cooling fan 6 feeds air outside the lighting device 1A from the first vent 8 into the internal space of the lighting device 1A. The internal space of the lighting device 1A is a space between the first base 2 and the second base 5. The air sent into the internal space of the lighting device 1A by the cooling fan 6 is discharged from the second vent 9 to the outside of the lighting device 1A. Thus, air flows in the space between the first vent 8 and the second vent 9. The air flow includes an air flow flowing along the upper surface of the first base 2, an air flow flowing along the surface of each of the radiation fins 4, and an air flow flowing along the lower surface of the second base 5. The air flow from the cooling fan 6 flows along the upper surface of the first base 2 and the surface of the radiation fin 4 so that the heat of the light emitting element 3 can be dissipated more efficiently, and the temperature of the light emitting element 3 is lowered. Can. Since the air flow from the cooling fan 6 flows along the lower surface of the second base 5, the heat of the power supply 7 can be dissipated more efficiently, and the reduction of the efficiency of the power supply 7 can be prevented more reliably. In the present embodiment, substantially all of the air blown out from the cooling fan 6 flows from the first vent 8 into the interior space of the lighting device 1A. That is, substantially all of the air blown out of the cooling fan 6 passes through the space between the first base 2 and the second base 5.

The support 10 connects between the first base 2 and the second base 5. The support 10 has a lower end fixed to the first base 2 and an upper end fixed to the second base 5. Struts 10 are provided at four corners of the first base 2 and the second base 5 respectively. That is, the first base 2 and the second base 5 are connected by the four columns 10. The strength and the rigidity of the lighting device 1A can be enhanced by the support 10 and the second base 5. The weight of the power supply 7 can be reliably supported by the support 10 and the second base 5. When the lighting device 1A is used in a gymnasium or a sports facility, a competition ball may fly to the lighting device 1A and collide. Even if the ball collides with the lighting device 1A, damage to the lighting device 1A can be reliably reduced by improving the strength and rigidity of the lighting device 1A as described above. In the present embodiment, the support 10 has an L-shaped cross-sectional shape. This makes the support 10 lightweight and highly rigid. The fixing method between the support 10 and the first base 2 and the second base 5 may be any method, for example, screwing, welding, brazing, bonding, and fitting.

The first vent 8 is formed by being surrounded by the first side of the first base 2, the first side of the second base 5, and the two columns 10. The second vent 9 has a second side opposite to the first side of the first base 2, a second side opposite to the first side of the second base 5, and two columns 10. It is formed by being surrounded by.

In the present embodiment, by generating convection by the cooling fan 6, both the light emitting element 3 and the power supply device 7 which are heat sources can be efficiently cooled at the same time. As shown in FIG. 3, in the present embodiment, the direction D1 of forced convection by the cooling fan 6 is a direction from the cooling fan 6 toward the radiation fin 4. As a modification, the reverse direction, that is, the direction from the radiation fins 4 to the cooling fan 6 may be set as the direction of forced convection by the cooling fan 6. Cooling air flowing from the outside causes convection by the cooling fan 6 to efficiently release the air receiving heat from the first base 2, the radiation fins 4 and the second base 5 to the external space of the lighting device 1A. it can. Thereby, the temperature of the light emitting element 3 and the power supply device 7 can be reduced. The cooling fan 6 is fixed by being attached to at least one of the first base 2, the second base 5, and the support 10, for example. The method for fixing the cooling fan 6 may be any method, for example, screwing, bonding, welding, snap fitting, and storage in a holder. The example shown in FIG. 1 is configured as follows. With a plurality of screws 16, the cooling fan 6 is a rib 2 a of one of the four sides of the first base 2 facing the cooling fan 6 and a rib of the other side of the second base 5 facing the cooling fan 6. Attached to 5b. The cooling fan 6 has a square housing as viewed from the direction of the fan rotation axis, and the screws 16 are respectively inserted through through holes formed at the four corners of the housing.

Note that FIG. 3 corresponds to a cross-sectional view in which the lighting device 1A is cut along a plane perpendicular to the first base 2 including the center line of the cooling fan 6. In other words, FIG. 3 corresponds to a cross-sectional view in which the lighting device 1A is cut in a plane parallel to the direction D1 of forced convection by the cooling fan 6 and perpendicular to the first base 2.

As a modification, in place of the axial flow fan as in the present embodiment, a centrifugal fan, a mixed flow fan, a cross flow fan or the like may be used as the cooling fan 6. The cooling fan 6 may be any fan as long as it is a forced air cooling system. The cooling fan 6 may be disposed so that its outlet or inlet faces the first vent 8.

As shown in FIG. 1, the lighting device 1 </ b> A in the present embodiment includes a first support 11 and a second support 12. The first support 11 is fixed to the first base 2. The first supports 11 are respectively installed on both sides of the first base 2. Among the four sides of the first base 2, the first support 11 is installed on two parallel sides not forming the first vent 8 and the second vent 9. The fixing method between the first support 11 and the first base 2 may be any method, for example, screwing, welding, brazing, bonding, and fitting. The first support 11 may be fixed to both the first base 2 and the second base 5. Also, the first support 11 may be integrated with the first base 2.

The second support 12 has an elongated plate-like fixed portion 12 a and a pair of arms 12 b protruding from both ends of the fixed portion 12 a. Each arm 12b protrudes in a direction perpendicular to the longitudinal direction of the fixed portion 12a. An arc-shaped elongated hole 12c is formed at the tip of each arm 12b. The second support 12 is rotatably coupled to the first support 11. The position of the rotation axis of the second support 12 is the position of the center of the circle along the arc of the long hole 12c. A bolt (not shown) is tightened to the screw hole of the first support 11 through the long hole 12 c, so that the second support 12 is firmly fixed so as not to rotate with respect to the first support 11. The fixing portion 12a of the second support 12 is fixed to a mounting surface such as a ceiling or a beam of a building. The fixing portion 12a is formed with a hole for passing a fixing bolt. In the state of FIG. 1, the fixing portion 12 a is parallel to the first base 2 and the second base 5. When the mounting surface is horizontal, the fixing portion 12a of the second support 12 is fixed to the mounting surface in the state of FIG. By doing this, the lighting device 1A is fixed to the mounting surface by the first support 11 and the second support 12 in an appropriate posture. When the mounting surface is an inclined surface inclined with respect to the horizontal plane, the angle of the second support 12 with respect to the first support 11 so that the arm 12b of the second support 12 is perpendicular with respect to the inclined surface Can change. That is, when the bolt (not shown) passing through the long hole 12c of the arm 12b is loosened, the second support 12 becomes rotatable relative to the first support 11, and the second support 12 is inclined relative to the first support 11. It can be done. When the second support 12 inclines with respect to the first support 11, the bolt moves relative to the long hole 12c. By retightening the bolt, the second support 12 can be fixed to the first support 11 at an arbitrary inclination angle. When the mounting surface is an inclined surface, the lighting device 1A can be installed in an appropriate posture by inclining and fixing the second support 12 with respect to the first support 11.

It is desirable that the second base 5, the power supply housing 7d, the support 10, the first support 11 and the second support 12 be made of a metal material having high strength and thermal conductivity. Examples of the metal material include aluminum, an aluminum-based alloy, and stainless steel.

As shown in FIG. 3, the lighting device 1 </ b> A includes a cable 13 that supplies power from the power supply device 7 to the light emitting element 3. The cable 13 is desirably covered with a rubber-based material or the like so as to be waterproof. When a current flows from the power supply device 7 to the light emitting element 3 via the cable 13, the light emitting element 3 is lit. FIG. 3 shows a state in which the cable 13 is cut halfway. Further, the power supply device 7 and the cooling fan 6 are also connected by a cable (not shown), and the cooling fan 6 is rotated by supplying a current from the power supply device 7 to the cooling fan 6 via the cable.

As shown in FIG.2 and FIG.3, the illuminating device 1A of this Embodiment is provided with the reflector 14 and the light transmission cover 15. As shown in FIG. The reflector 14 forms a reflective surface around each light emitting element 3. The reflection surface is formed in the shape of a conical surface around the light emitting surface of each light emitting element 3. The reflection surface of the reflector 14 reflects light emitted sideways from each light emitting element 3 downward. Thus, the amount of light emitted downward from the lighting device 1A can be increased. It is desirable that at least the reflection surface of the reflector 14 be made of a white material or a white-coated material having a high reflectance and a low absorptivity.

The translucent cover 15 is fixed under the first base 2. The light transmitting cover 15 covers the whole of the plurality of light emitting elements 3 and the reflector 14. The light from the light emitting element 3 and the light reflected by the reflector 14 pass through the light transmitting cover 15 and are irradiated to the outside of the lighting device 1A. The translucent cover 15 reliably protects the light emitting element 3 and the reflector 14 from dirt or water. By providing the light transmitting cover 15, the deterioration or failure of the light emitting element 3 can be reliably prevented. The translucent cover 15 is desirably made of a transparent material that transmits light specularly. Alternatively, the light transmitting cover 15 may diffuse and transmit light. The translucent cover 15 may be made of, for example, a resin material such as a polycarbonate resin, an acrylic resin, or a polystyrene resin, or a glass material. The surface of the light transmitting cover 15 may be subjected to a coating treatment, such as a hard coating treatment, which is advantageous for suppressing the aging. The light transmitting cover 15 may be waterproof. The joint between the light transmitting cover 15 and the first base 2 may be provided with a waterproof sealing material or adhesive. The sealing material or the adhesive may be made of, for example, a soft resin material, a sealing material such as silicone, a rubber material, or the like.

As shown in FIG. 4, the lighting system according to the first embodiment includes a lighting device 1A and a terminal device 60 configured to allow the user to remotely control the lighting device 1A. The details of the terminal device 60 will be described later. In the present embodiment, the power supply device 7 further includes a control unit 7e in addition to the light source drive circuit 7a and the fan drive circuit 7b. The controller 7e drives the light source unit 17 via the light source drive circuit 7a. The controller 7e drives the cooling fan 6 via the fan drive circuit 7b. The control unit 7e includes a processor 7f and a memory 7g. Typically, control unit 7e has a configuration including a microcomputer. The controller 7e is provided in the power supply housing 7d. The controller 7e is provided on the electronic circuit board 7c. As a modification, the electronic circuit board which comprises control part 7e, and the electronic circuit board which constitutes light source drive circuit 7a and fan drive circuit 7b may be separated.

The light source unit 17 includes a plurality of light emitting elements 3. In the example of FIG. 4, a plurality of light emitting elements 3 are connected in series in the light source unit 17. Instead of this example, the plurality of light emitting elements 3 in the light source unit 17 may be connected in a parallel manner, or may be connected in a series-parallel manner.

The light source drive circuit 7 a supplies a current to the light emitting element 3 of the light source unit 17. The light source drive circuit 7a includes a power supply circuit that converts AC power supplied from an AC power supply 100 outside the lighting device 1A into DC power. The power supply circuit may include, for example, a switching power supply using a semiconductor switch element. AC power supply 100 is typically a commercial power supply. The light source drive circuit 7a can adjust the luminous flux emitted from the light emitting element 3 by adjusting the current flowing through the light emitting element 3 according to the command from the control unit 7e. Thereby, the illuminance and the luminance by the lighting device 1A can be adjusted.

The temperature correlated with the temperature of the light emitting element 3 of the light source unit 17 is hereinafter referred to as "light source temperature". The light source temperature sensor 18 detects the light source temperature. The light source temperature sensor 18 is an example of light source temperature detection means. The temperature of the first base 2 or the radiation fin 4 correlates to the temperature of the light emitting element 3. Therefore, the light source temperature can be detected by attaching the light source temperature sensor 18 to the first base 2 or the radiation fin 4. Alternatively, the light source temperature sensor 18 may be attached to the light emitting element 3 itself. Information on the light source temperature detected by the light source temperature sensor 18 is input to the control unit 7 e. The control unit 7e can individually control the light source drive circuit 7a and the fan drive circuit 7b based on the information on the light source temperature detected by the light source temperature sensor 18.

The fan drive circuit 7b supplies power to the motor of the cooling fan 6 in accordance with a command from the control unit 7e. The fan drive circuit 7 b can adjust the rotational speed of the cooling fan 6 by adjusting at least one of the current, voltage, and frequency of the power supplied to the motor of the cooling fan 6. The rotational speed of the cooling fan 6 is hereinafter referred to as "fan speed". A fan speed sensor 19 for detecting the fan speed is provided in the cooling fan 6. The fan speed sensor 19 is an example of fan speed detection means.

In the following description, the current value of the direct current supplied to the light emitting element 3 of the light source unit 17 is referred to as “light source current”. Information on the fan speed detected by the fan speed sensor 19 is input to the control unit 7e via the fan drive circuit 7b. The controller 7e can control the light source current by controlling the light source drive circuit 7a based on the information on the fan speed detected by the fan speed sensor 19. The control unit 7e can control the light source current by controlling the light source drive circuit 7a based on the information of the light source temperature detected by the light source temperature sensor 18. Furthermore, the control unit 7e can control the fan speed of the cooling fan 6 by controlling the fan drive circuit 7b based on the information of the light source temperature.

FIG. 5 is a diagram showing the relationship between the luminous flux emitted by the light emitting element 3, the light source current, and the light source temperature. As shown in FIG. 5, the light emitting element 3 has the following characteristics. As the light source current is increased, the luminous flux is increased. When the light source currents are equal, the light flux becomes larger under the condition where the light source temperature is lower than the condition where the light source temperature is high. In order to obtain a predetermined luminous flux, it is necessary to control the light source current and to control the light source temperature.

In the present embodiment, the controller 7e can control both the light source current and the light source temperature by controlling the light source drive circuit 7a based on the information on the light source temperature. Hereinafter, an example of control will be described.

(Example 1) As described above, in order to obtain a predetermined luminous flux, it is necessary to control both the light source current and the light source temperature. For example, when the light source drive circuit 7a is controlled so that the light source current becomes constant, the luminous flux changes according to the change of the light source temperature, so the light source temperature needs to be constant. In this case, the control unit 7e can make the light source temperature constant by controlling the fan speed of the cooling fan 6 with the fan drive circuit 7b so that the light source temperature detected by the light source temperature sensor 18 becomes constant. it can. That is, the control unit 7e controls the light source drive circuit 7a and the fan drive circuit 7b such that the light source current is constant and the light source temperature is constant, so that it is possible to provide the lighting device 1A that can obtain a constant light flux. . By obtaining a constant luminous flux, constant illuminance and luminance can be obtained. As a modification, the controller 7e may control on / off of the cooling fan 6 so that the light source temperature detected by the light source temperature sensor 18 becomes constant.

(Example 2) As another example, it is assumed that the lighting device 1A is lit in a range where the light source temperature is lower than a predetermined temperature. The predetermined temperature is within the usable temperature range of the light emitting element 3 and the desired luminous flux is obtained when the light emitting element 3 is lighted for a long time at this predetermined temperature, and the expected life time is obtained. It is a temperature that can be achieved. When the lighting device 1A is lit in a range where the light source temperature is equal to or lower than the predetermined temperature, the controller 7e controls the light source to lower the light source current as the light source temperature is lower and A constant luminous flux can be obtained by controlling the drive circuit 7a and the fan drive circuit 7b. By obtaining a constant luminous flux, constant illuminance and luminance can be obtained. According to this example 2, at least one of the operating time of the cooling fan 6 and the fan speed can be reduced. As a result, the life of the cooling fan 6 can be extended, and the reliability of the lighting device 1A can be further improved.

The controller 7 e is configured to enable data communication with the terminal device 60. The communication method between the control unit 7e and the terminal device 60 may be wired communication or wireless communication. The terminal device 60 includes an operation unit 61 for the user to operate, and a display 62 for notifying information by displaying characters, figures, characters, and the like. The operation unit 61 may include, for example, a push button or a key. The terminal device 60 can transmit to the control unit 7e, for example, an instruction related to lighting, extinguishing, dimming, and the like of the lighting device 1A according to a user operation. The display 62 is an example of notification means. For example, the operation unit 61 and the display 62 may be integrally configured by a touch screen. The terminal device 60 may include other notification means such as an audio output device in addition to or in place of the display 62. The terminal device 60 may be fixed to a wall of a room or the like. The terminal device 60 may be a portable portable terminal. The terminal device 60 and the control unit 7e may be directly communicable. The terminal device 60 and the control unit 7e may be able to communicate indirectly via another device such as a controller of a lighting control system, for example.

The control unit 7e can detect at least one of an event related to a failure of the cooling fan 6, an event related to the life of the cooling fan 6, and an event related to the life of the light source unit 17. In the following description, the event that can be detected by the control unit 7 e is referred to as a “specific event”. When a specific event related to the cooling fan 6 occurs, it is considered that the cooling fan 6 needs to be checked, repaired or replaced. When a specific event related to the light source unit 17 occurs, it is considered that the light source unit 17 needs to be checked, repaired or replaced. In the following description, checking, repairing, or replacing at least one of the cooling fan 6 and the light source unit 17 may be collectively referred to as "maintenance". When a specific event occurs, the control unit 7e lights the light source unit 17 at least temporarily in the notification lighting mode instead of the normal lighting mode. The illumination state in the notification lighting mode and the illumination state in the normal lighting mode can be distinguished by human vision. Therefore, by lighting the light source unit 17 in the notification lighting mode, it is possible to reliably notify the user of the occurrence of a specific event. That is, when the user visually recognizes that the light source unit 17 is lit in the notification lighting mode, the user can know that maintenance is necessary.

The terminal device 60 can receive an operation for the user to cancel the notification lighting mode. The terminal device 60 can transmit a release command for releasing the lighting of the light source unit 17 in the notification lighting mode according to the user operation. When the user wants to end the notification in the notification lighting mode, the user can cause the terminal device 60 to transmit a release command by operating the terminal device 60. The controller 7e receives the release command. After receiving the cancellation command, the control unit 7e prevents the light source unit 17 from being lit in the notification lighting mode. After receiving the release command, the control unit 7e causes the light source unit 17 to light in the normal lighting mode.

The illumination state in the notification lighting mode has a different influence on the user's vision compared to the illumination state in the normal lighting mode. For this reason, when the light source part 17 is lighted in alerting | reporting lighting mode, it may interfere with utilization of the space illuminated by 1 A of illuminating devices. Once the user is notified of the occurrence of the specific event, the necessity of lighting the light source unit 17 in the notification lighting mode is small. The user who has confirmed the notification in the notification lighting mode can end the notification in the notification lighting mode by transmitting a release command from the terminal device 60, and can turn on the light source unit 17 in the normal lighting mode. Thereby, even after the specific event occurs, the space illuminated by the lighting device 1A can be used without any problem.

When a specific event occurs, it is not always possible to perform maintenance on the lighting device 1A. In particular, in the case where the lighting apparatus 1A is installed on a high ceiling of a factory, a warehouse, a gymnasium, a competition facility or the like, it is necessary to set a foothold, so a period for preparation is necessary. In the present embodiment, by transmitting a release command from the terminal device 60 in response to a user operation, the space illuminated by the lighting device 1A in the period from the occurrence of a specific event to the execution of maintenance can be obtained. , It becomes possible to use without trouble.

FIG. 6 is a flowchart showing processing performed by the control unit 7e of the lighting device 1A in the first embodiment. The control unit 7e periodically and repeatedly executes the processing of this flowchart.

In step S1, the controller 7e determines whether a specific event has been detected. The process for detecting a specific event will be described later. When the specific event is not detected, the process proceeds from step S1 to step S2, and the control unit 7e controls the light source drive circuit 7a so that the light source unit 17 lights in the normal lighting mode. After step S2, the control unit 7e ends the current processing cycle. On the other hand, when the specific event is detected in step S1, the process proceeds to step S3, and the control unit 7e controls the light source drive circuit 7a so that the light source unit 17 lights in the notification lighting mode.

The process proceeds from step S3 to step S4, and the control unit 7e determines whether the release command transmitted from the terminal device 60 has been received. If the release command has not been received, the process returns to step S3 and the notification lighting mode is continued. On the other hand, when the cancellation command is received in step S4, the process proceeds to step S5, and the control unit 7e cancels the notification lighting mode. When the notification lighting mode is canceled, thereafter, the control unit 7e causes the light source drive circuit 7a to light the light source unit 17 in the normal lighting mode without lighting the light source unit 17 in the notification lighting mode. Control. After step S5, the control unit 7e ends the current processing cycle.

Hereinafter, an example of processing for the control unit 7e to detect a specific event will be described.
(Example 1) The controller 7e may detect a failure of the cooling fan 6 as a specific event as follows. In a state where the controller 7e instructs the cooling fan 6 to operate via the fan drive circuit 7b, if the fan speed detected by the fan speed sensor 19 is zero or very low, the cooling fan 6 is considered to be out of order. Therefore, the controller 7 e can detect the failure of the cooling fan 6 by comparing the fan speed detected by the fan speed sensor 19 with the reference. In the case where the lighting apparatus 1A is installed on a high ceiling, it is difficult for the user to notice the failure of the cooling fan 6 since it is difficult to directly view the stop or operation state of the cooling fan 6 It is. Even in such a case, the failure of the cooling fan 6 can be automatically detected by the above.

When an abnormality in the cooling fan 6 is detected, the control unit 7e may control the light source drive circuit 7a so that the light source current is lower than in the case where there is no abnormality in the cooling fan 6. When an abnormality of the cooling fan 6 is detected, the control unit 7e may reduce the light source current such that the light source temperature detected by the light source temperature sensor 18 is equal to or lower than a predetermined temperature. By doing as described above, when the abnormality of the cooling fan 6 occurs, the light source temperature can be reliably prevented from rising significantly, so the thermal deterioration of the light emitting element 3 can be surely prevented.

(Example 2) The control unit 7e may detect the life of the cooling fan 6 as a specific event as follows. The motor provided to the cooling fan 6 has a bearing. In general, the life of the bearing is considered to be dependent on the integrated operation time or the integrated rotational speed. The controller 7 e can calculate the integrated rotational speed of the cooling fan 6 based on the fan speed detected by the fan speed sensor 19 and the operation time of the cooling fan 6. When the cumulative operation time or cumulative number of revolutions of cooling fan 6 exceeds the reference, control unit 7 e detects that cooling fan 6 has reached the end of its life, that is, it is time to replace cooling fan 6. Do. By doing as described above, it is possible to urge the user to replace the cooling fan 6 before the cooling fan 6 fails due to aged deterioration.

(Example 3) The control unit 7e may detect the lifetime of the light source unit 17, that is, the lifetime of the light emitting element 3 as a specific event as follows. It is considered that the life of the light source unit 17 depends on the light source current, the light source temperature, and the lighting time of the light source unit 17. The longer the light source current is, the shorter the life of the light source unit 17 tends to be. As the light source temperature is higher, the life of the light source unit 17 tends to be shorter. The light source drive circuit 7a includes a light source current detection circuit that detects a light source current. The light source current detection circuit is an example of light source current detection means. The control unit 7e can detect the life of the light source unit 17 based on the light source current detected by the light source current detection circuit, the light source temperature detected by the light source temperature sensor 18, and the lighting time of the light source unit 17. The control unit 7e can calculate the integrated lighting time of the light source unit 17. At this time, the control unit 7e calculates the integrated lighting time of the light source unit 17 by adding a weighting for correcting the influence of the light source current and a weighting for correcting the influence of the light source temperature. Do. When the integrated lighting time exceeds the reference, the control unit 7e detects that the light source unit 17 has reached the end of its life, that is, the time to replace the light source unit 17 has come. By doing as described above, it is possible to urge the user to replace the light source unit 17 before the light source unit 17 causes a failure due to aged deterioration. As a modification, the control unit 7e may detect the life of the light source unit 17 based on the integrated lighting time obtained by simply integrating the lighting time of the light source unit 17 without using the information of the light source current and the light source temperature. In the case of a use environment in which the change in the light source current and the light source temperature is small, it is possible to detect the life of the light source unit 17 with high accuracy also by the modification.

FIG. 7 is a diagram showing a first example of the change of the light source current in the notification lighting mode. 7 to 9, t on the horizontal axis indicates time, and I on the vertical axis indicates light source current. The first example shown in FIG. 7 is as follows. The notification lighting mode is a mode in which the light source unit 17 is repeatedly blinked. The controller 7e controls the light source drive circuit 7a so that the light source current periodically changes to zero and a constant value larger than zero. The blinking period of the light source unit 17 is set to have a length such that a person can visually detect the blinking. In FIG. 7, the light source current is changed as a rectangular wave. Alternatively, the light source current may gradually change between zero and a value larger than zero.

FIG. 8 is a diagram showing a second example of the change of the light source current in the notification lighting mode. In this second example, it is as follows. The notification lighting mode is a mode in which the intensity of the light output of the light source unit 17 is repeated. The controller 7e controls the light source drive circuit 7a so that the light source current periodically changes to a first value and a second value larger than the first value. The cycle of repeating the intensity of the light output of the light source unit 17 has a length such that changes in the intensity of the light output can be sensed by human vision. In FIG. 8, the light source current is changed as a rectangular wave.

FIG. 9 is a diagram showing a third example of the change of the light source current in the notification lighting mode. The third example is a modification of the second example. The third example is the same as the second example except that the light source current gradually changes between the first value and the second value larger than the first value.

The normal lighting mode is a mode that can be felt by human vision so that the brightness is constant in time. By setting the mode in which the light source unit 17 blinks or the intensity of light output is repeated as the notification lighting mode as described above, the user can easily and reliably identify the difference from the normal lighting mode. Therefore, the user can be surely notified of the occurrence of a specific event.

As a modification, the control unit 7e controls the light source drive circuit 7a so that the color of light emitted from the light source unit 17 in the notification lighting mode differs from the color of light emitted from the light source unit 17 in the normal lighting mode. You may For example, by providing plural types of light emitting elements 3 with different luminescent colors in the light source unit 17 and making the ratio of the light quantity from the light emitting elements 3 with different luminescent colors different between the notification lighting mode and the normal lighting mode The light color of the lighting mode and the light color of the normal lighting mode can be made different. In the case of this modification, the user can easily and reliably distinguish between the notification lighting mode and the normal lighting mode by the difference in the color of the light emitted from the light source unit 17. If the light color in the normal lighting mode is a white area, the light color in the notification lighting mode may be an area other than the white area, such as a red area, a green area, a yellow area, or a blue area. Good. When the light color of the notification lighting mode and the light color of the normal lighting mode are different, the brightness in the notification lighting mode may be perceived by human vision so as to be constant in time. Alternatively, the light color of the notification lighting mode and the light color of the normal lighting mode may be different, and the blinking of the light source unit 17 or the intensity of the light output may be repeated in the notification lighting mode. By doing so, the user can very easily and reliably identify that the notification lighting mode is different from the normal lighting mode.

When a specific event is detected, the control unit 7e may cause the light source unit 17 to always light in the notification lighting mode. Alternatively, when a specific event is detected, the control unit 7e may temporarily turn on the light source unit 17 in the notification lighting mode, and turn on the light source unit 17 in the normal lighting mode otherwise. If the light source unit 17 is temporarily turned on in the notification lighting mode, the user can be notified of the occurrence of a specific event. For this reason, it is because it is not necessary to always turn on the light source part 17 by alerting | reporting lighting mode always.

When a specific event occurs, the control unit 7e lights the light source unit 17 in the notification lighting mode at a predetermined timing, and turns on the light source unit 17 in the normal lighting mode at times other than the timing. It is also good. For example, it may be as follows. As a first example, the light source unit 17 may be turned on in the notification lighting mode only for a predetermined time from the lighting start of the lighting device 1A, and thereafter, the light source unit 17 may be turned on in the normal lighting mode. As a second example, the light source unit 17 may be turned on in the notification lighting mode at predetermined time intervals, and the light source unit 17 may be turned on in the normal lighting mode otherwise. For example, the light source unit 17 may be turned on in the notification lighting mode for several minutes at intervals of 30 minutes or one hour, and the light source unit 17 may be turned on in the normal lighting mode otherwise. As a third example, the light source unit 17 may be turned on in the notification lighting mode at a predetermined time, and the light source unit 17 may be turned on in the normal lighting mode otherwise.

The control unit 7e may be capable of detecting two or more of the events related to the failure of the cooling fan 6, the events related to the life of the cooling fan 6, and the events related to the life of the light source unit 17 as a specific event. In the following description, it is assumed that the control unit 7e can detect at least two specific events. The two specific events detected by the control unit 7e will be called "first specific event" and "second specific event". In this case, the following may be performed. The control unit 7e has a first notification lighting mode and a second notification lighting mode as the notification lighting mode. The illumination state in the first notification lighting mode and the illumination state in the second notification lighting mode can be distinguished by human vision. For example, it may be as follows. Of the notification lighting modes described above, the mode in which the light source unit 17 repeats blinking may be set as a first notification lighting mode, and the mode in which the light output of the light source unit 17 repeats intensity may be set as a second notification lighting mode. Alternatively, the control unit 7e controls the light source drive circuit 7a so that the color of light emitted from the light source unit 17 in the first notification lighting mode is different from the color of light emitted from the light source unit 17 in the second notification lighting mode. May be controlled.

When the first specific event occurs, the control unit 7e lights the light source unit 17 in the first notification lighting mode instead of the normal lighting mode at least temporarily. When the second specific event occurs, the control unit 7e lights the light source unit 17 at least temporarily in the second notification lighting mode instead of the normal lighting mode. By doing so, the following effects can be obtained. Since the user can easily identify visually whether the first notification lighting mode or the second notification lighting mode, it is possible to easily and reliably know which event has occurred, the first specific event or the second specific event. it can. At least one of the event related to the failure of the cooling fan 6 and the event related to the life of the cooling fan 6 may be a first specific event, and the event related to the life of the light source unit 17 may be a second specific event. By doing this, the user can easily and surely know whether an event related to the failure or the life of the cooling fan 6 or an event related to the life of the light source unit 17 has occurred.

When a specific event occurs, the terminal device 60 may notify the user of the occurrence of the specific event. For example, it may be as follows. When the specific event is detected, the control unit 7e transmits a command to notify the terminal device 60 of the occurrence of the specific event. The terminal device 60 having received the command notifies the user of the occurrence of the specific event, for example, by the display on the display 62 or the voice from the voice output device. By doing this, it is possible to more reliably notify the user of the occurrence of a specific event. When the control unit 7e can detect a plurality of types of specific events, the terminal device 60 may notify the user of which specific event has occurred.

Since the cooling fan 6 is operated during the time period in which the lighting device 1A is on, dust is less likely to be deposited on the first base 2. However, dust may accumulate on the first base 2 in the turn-off time zone, which is a time zone in which the lighting device 1A is turned off. As a light off time zone, for example, a midnight time zone may be mentioned. In addition, holidays of facilities such as a factory or a warehouse where the lighting device 1A is used may correspond to the turn-off time zone. The period of continuous holidays or long vacations of the above facilities may correspond to the turn-off time zone. In that case, the turn-off time spans over several days. It goes without saying that the control unit 7e can control the turn-off time zone since the control unit 7e controls lighting of the light source unit 17 via the light source drive circuit 7a. In addition, for example, information on a turn-off time zone such as a holiday of the above-mentioned facility may be stored in the control unit 7e.

The control unit 7e may control the fan drive circuit 7b so as to operate the cooling fan 6 in at least a part of the light off time zone. Thereby, the following effects can be obtained. The dust attached to the first base 2 in the extinguishing time zone can be blown away by the wind of the cooling fan 6 to be removed. Therefore, since the accumulation of dust on the first base 2 can be prevented, it is possible to prevent the decrease in the heat radiation efficiency of the first base 2. As a result, the temperature of the light emitting element 3 can be more reliably prevented from rising.

The control unit 7e controls the fan drive circuit 7b so that the fan speed when the cooling fan 6 is operated in the light off time zone is higher than the fan speed in the time zone when the lighting device 1A is on. You may control. In this way, it is possible to more reliably prevent the accumulation of dust on the first base 2 in the light off time zone. Since there is a high possibility that the user is in the vicinity of the lighting device 1A, when the fan speed is increased, the user may hear the noise of the cooling fan 6. On the other hand, if the turn-off time zone, especially the turn-off time zone over a long time, the user is considered absent, the noise of the cooling fan 6 will not be a problem even if the fan speed is increased.

The control unit 7e controls the cooling fan 6 to operate temporarily so as to prevent the accumulation of dust on the first base 2 when the time during which the lighting device 1A is turned off exceeds the reference. May be The reference may be, for example, 12 hours, 24 hours, or the like.

Based on the information received from an environment sensor (not shown) that detects information regarding the environment in which the lighting device 1A is used or the environment from which the light from the lighting device 1A is received, the control unit 7e performs You may control. That is, based on the information detected by the environment sensor, the control unit 7e may control lighting, extinguishing, dimming, etc. of the light emitting element 3 or control the operation of the cooling fan 6. The environment sensor may be, for example, at least one of an air temperature sensor for detecting the temperature of the environment, a brightness sensor for detecting the brightness of the environment, and a human sensor for detecting a person in the environment. For example, it may be as follows.

Even if the air temperature is detected by the air temperature sensor as an environment sensor, and the air temperature is relatively high, the control unit 7e controls the fan speed of the cooling fan 6 to be higher than when the air temperature is relatively low. Good. The brightness of the environment may be detected by a brightness sensor as an environment sensor, and the controller 7e may increase or decrease the light output from the lighting device 1A so that the brightness of the environment becomes constant. When a human sensor as an environment sensor detects a person, the controller 7e may turn on the lighting device 1A. When the human sensor does not detect a person, the controller 7e may dim or extinguish the lighting device 1A.

Furthermore, according to the first embodiment, the following effects can be obtained.
(Effect 1) By arranging the cooling fan 6 on the side surface of the lighting device 1A, it is not necessary to provide a space for installing the cooling fan 6 inside the lighting device 1A. If a fan is disposed on the heat radiation fins 4 or on the power supply device 7, it is necessary to provide a space for installation of the fan, and the height dimension of the lighting device 1A is at least the thickness dimension of the fan. growing. Compared to such a configuration, the height dimension of the lighting device 1A can be made smaller. As a result, the workability when installing the lighting device 1A on a ceiling or the like is improved. Furthermore, in the case of an earthquake, the amplitude of the lighting device 1A can be reduced, and the earthquake resistance can be improved.

(Effect 2) The cooling fan 6 can promote the dissipation of heat from the first base 2, the radiation fin 4, and the power supply 7. Thereby, both the light emitting element 3 and the power supply device 7 can be cooled effectively. As a result, high efficiency, long life, and large luminous flux of the light emitting element 3 can be achieved. Further, the size and weight of the heat sink composed of the first base 2 and the radiation fin 4 can be reduced. Furthermore, downsizing and high efficiency of the power supply 7 can be achieved.

(Effect 3) By arranging the cooling fan 6 on the side surface of the lighting device 1A, an air path can be effectively formed by the plurality of plate-shaped heat radiation fins 4 arranged in parallel. The heat sink including the plate-like plurality of heat dissipating fins 4 arranged in parallel can be manufactured by a simple and inexpensive manufacturing method. For example, the heat sink can also be manufactured by extrusion molding. On the other hand, in the case where the fan is arranged on the heat sink, in order to effectively secure the air path, it is necessary to provide a relatively high cost pin fin or select a cast heat sink which is easy to be made heavy There is a possibility that you will be forced to

(Effect 4) In the power supply device 7, the control unit 7e can control both the light source drive circuit 7a for lighting the light emitting element 3 and the fan drive circuit 7b for driving the cooling fan 6, as described below. An effect is obtained. The cooling fan 6 can be appropriately driven according to the installation environment. The fan speed of the cooling fan 6 can be controlled in accordance with the ambient temperature of the lighting device 1A or the light source temperature. For example, even in a high temperature environment such as a factory, it is possible to extend the life of the light emitting element 3 and the cooling fan 6.

(Effect 5) By arranging the cooling fan 6 on the side surface of the lighting device 1A, assembly of the lighting device 1A becomes easy. It is easy to develop the product with or without the cooling fan 6 and contributes to the standardization of the product. For example, it is possible to increase the light source current by adding the cooling fan 6 to a lighting device without the cooling fan 6 and having an instrument luminous flux of 10,000 lumens, for example, an instrument luminous flux of 15,000 lumens The lighting device 1A can be achieved. As described above, with the presence or absence of the cooling fan 6, lighting devices with different performances can be manufactured easily and at low cost.

(Effect 6) When the lighting device 1A is viewed from above, the entire power supply housing 7d is located inside the outer edge of the first base 2. Thereby, the following effects can be obtained. Since the substantial occupied space of the lighting device 1A can be reduced, the lighting device 1A can be disposed with a small space. Since the weight balance of the lighting device 1A is improved, the amplitude of the lighting device 1A at the time of an earthquake can be reduced, and the earthquake resistance can be further improved. Further, when the lighting device 1A is viewed from above, the entire power supply housing 7d is located inside the outer edge of the second base 5. Thereby, the above-mentioned effect can be produced more remarkably.

In the first embodiment, the cooling fan 6 is disposed such that the direction of the air flow from the outlet of the cooling fan 6 is parallel to the first base 2. As a modification example, although not shown, the air outlet of the cooling fan 6 is directed obliquely downward so that the direction of the air flow from the air outlet of the cooling fan 6 is oblique to the first base 2 A fan 6 may be arranged. By doing so, the following effects can be obtained. The air flow from the outlet of the cooling fan 6 can be more efficiently applied to the first base 2. As a result, heat can be dissipated more efficiently from the first base 2 that has a high temperature, so the temperature of the light emitting element 3 can be further lowered.

Second Embodiment
Next, Embodiment 2 will be described with reference to FIG. 10, but differences from Embodiment 1 described above will be mainly described, and description of the same or corresponding parts will be simplified or omitted. FIG. 10 is a perspective view of a lighting device 1B provided in the lighting system according to the second embodiment as viewed obliquely from above.

As shown in FIG. 10, the cooling fan 6 provided in the lighting device 1B according to the second embodiment is installed at a slightly higher position than the first embodiment. The upper end of the cooling fan 6 is at a higher position than the second base 5. The lower end of the cooling fan 6 is at a height between the first base 2 and the second base 5. The cooling fan 6 is fixed to the power supply housing 7 d by two screws 16. The cooling fan 6 has a portion facing the power supply housing 7 d and a portion facing the first vent 8.

A part of the air flow generated by the cooling fan 6 hits the surface of the power supply housing 7 d. The power supply housing 7 d has a side surface facing in the same direction as the first vent 8. A part of the air flow generated by the cooling fan 6 hits the side surface of the power supply housing 7d. The remaining air flow of the air flow generated by the cooling fan 6 flows from the first vent 8 into the space between the first base 2 and the second base 5 in the same manner as the air flow of the first embodiment. , And discharged from the second vent 9 to the outside.

According to the second embodiment, in addition to the effects similar to the first embodiment, the following effects can be further obtained. When a part of the air flow generated by the cooling fan 6 hits the surface of the power supply housing 7 d, heat dissipation from the surface of the power supply housing 7 d can be further promoted. As a result, the temperature of the electrical components included in the power supply 7 can be further lowered, and the efficiency of the power supply 7 can be further improved. Further, since the cooling fan 6 is at a relatively high position, more cooling air flows to the upper portion of the heat dissipating fin 4, that is, the tip portion of the heat dissipating fin 4. As a result, the heat dissipation of the light emitting element 3 is also improved.

The cooling fan 6 is not fixed to the second base 5 but fixed to the power supply housing 7 d with a screw 16. Among the four sides of the second base 5, the ribs 5b on the side facing the cooling fan 6 are not provided. In the present embodiment, since it is not necessary to fix the cooling fan 6 to the second base 5 with the screw 16, the rib 5b of the second base 5 can be omitted. Thereby, the second base 5 can be reduced in weight and cost, and the weight and cost of the lighting device 1B can be reduced.

DESCRIPTION OF SYMBOLS 1A, 1B illumination apparatus, 2 1st base, 3 light emitting element, 4 radiation fin, 5 2nd base, 6 cooling fan, 7 power supply device, 7a light source drive circuit, 7b fan drive circuit, 7c electronic circuit board, 7d power supply case Body, 7e control unit, 8 first vent, 9 second vent, 10 post, 11 first support, 12 second support, 13 cable, 14 reflector, 15 translucent cover, 17 light source part, 18 light source temperature sensor , 19 fan speed sensor, 60 terminals, 61 operation parts, 62 displays, 100 AC power supply

Claims (12)

1. A lighting system comprising: a lighting device; and a terminal device configured to allow a user to remotely control the lighting device.
   The lighting device is
   A light source unit having a light emitting element;
   A heat sink for dissipating heat from the light source section;
   A cooling fan generating an air flow for cooling the heat sink;
   Control means for driving the light source unit and the cooling fan;
   Equipped with
   When at least one of the event related to the failure of the cooling fan, the event related to the life of the cooling fan, and the event related to the life of the light source unit occurs, the control means turns on at least temporarily, usually. Instead of the mode, the light source unit is lit in the notification lighting mode,
   It is possible to distinguish between the notification lighting mode and the normal lighting mode by human vision,
   The said terminal device can receive the operation for releasing the said notification lighting mode. The illumination system.
2. The lighting system according to claim 1, wherein the terminal device includes a notification unit that notifies occurrence of the at least one event.
3. A fan speed detection unit that detects a fan speed that is a rotation speed of the cooling fan;
   The lighting system according to claim 1 or 2, wherein the control means detects a failure of the cooling fan as the at least one event based on the fan speed.
4. The lighting according to any one of claims 1 to 3, wherein the control means detects the life of the cooling fan as the at least one event based on an integrated operating time or an integrated number of revolutions of the cooling fan. system.
5. A light source temperature detection unit that detects a light source temperature that is a temperature correlated with the temperature of the light source unit;
   A light source current detection unit that detects a light source current that is a current value of the light source unit;
   Equipped with
   The control means detects the lifetime of the light source unit as the at least one event based on the light source temperature, the light source current, and the lighting time of the light source unit. The lighting system according to one item.
6. When the at least one event occurs, the control means causes the light source unit to light in the notification lighting mode at a predetermined timing, and the light source unit in the normal lighting mode at times other than the timing. The lighting system according to any one of claims 1 to 5, which is turned on.
7. The lighting system according to any one of claims 1 to 6, wherein the notification lighting mode is a mode in which the blinking of the light source unit or the intensity of light output is repeated.
8. The color of the light irradiated from the light source unit in the notification lighting mode and the color of the light irradiated from the light source unit in the normal lighting mode are different from each other according to any one of claims 1 to 7. Lighting system.
9. The lighting system according to any one of claims 1 to 8, wherein the control means operates the cooling fan in at least a part of a time zone in which the lighting device is turned off.
10. The rotation speed of the cooling fan when the cooling fan is operated in the at least a part of the time zone is higher than the rotation speed of the cooling fan when the lighting device is on. Lighting system.
11. The lighting system according to any one of claims 1 to 10, wherein the at least one event includes at least a time to replace at least one of the cooling fan and the light source unit.
12. The at least one event includes a first specific event and a second specific event,
    When the first specific event occurs, the control means at least temporarily turns on the light source unit in the first notification lighting mode instead of the normal lighting mode.
    When the second specific event occurs, the control means at least temporarily turns on the light source unit in the second notification lighting mode instead of the normal lighting mode.
    The illumination system according to any one of claims 1 to 11, wherein the first notification lighting mode and the second notification lighting mode can be distinguished by human vision.

Images