[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

CN110832249A - Lighting system - Google Patents

Lighting system Download PDF

Info

Publication number
CN110832249A
CN110832249A CN201780091486.6A CN201780091486A CN110832249A CN 110832249 A CN110832249 A CN 110832249A CN 201780091486 A CN201780091486 A CN 201780091486A CN 110832249 A CN110832249 A CN 110832249A
Authority
CN
China
Prior art keywords
light source
cooling fan
lighting
light
base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201780091486.6A
Other languages
Chinese (zh)
Inventor
吉野勇人
伏江辽
松原大介
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Mitsubishi Electric Lighting Corp
Original Assignee
Mitsubishi Electric Corp
Mitsubishi Electric Lighting Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp, Mitsubishi Electric Lighting Corp filed Critical Mitsubishi Electric Corp
Publication of CN110832249A publication Critical patent/CN110832249A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00—Safety devices structurally associated with lighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/503—Cooling arrangements characterised by the adaptation for cooling of specific components of light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/508—Cooling arrangements characterised by the adaptation for cooling of specific components of electrical circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The lighting system is provided with a terminal device (60) configured so that a user can remotely operate the lighting device (1A). The lighting device (1A) is provided with: the light source unit (17) having the light emitting element (3), the heat sinks (2, 4), and a control member (7e) for driving the light source unit (17) and the cooling fan (6). When at least one of a phenomenon relating to a failure of the cooling fan (6), a phenomenon relating to the life of the cooling fan (6), and a phenomenon relating to the life of the light source unit (17) occurs, the control means (7e) causes the light source unit (17) to be turned on in the notification lighting mode instead of the normal lighting mode at least temporarily. The lighting mode and the normal lighting mode can be notified using human visual recognition. The terminal device (60) can accept an operation for releasing the notification lighting mode.

Description

Lighting system
Technical Field
The present invention relates to lighting systems.
Background
Lighting devices using light emitting elements such as Light Emitting Diodes (LEDs) have been widely used. When the temperature of the light-emitting element increases due to heat generation of the light-emitting element, energy efficiency decreases and the life of the light-emitting element becomes short. Therefore, in order to prevent the temperature of the light emitting element from increasing, it is desirable to improve the heat dissipation of the light emitting element. In particular, since a lighting device for a high ceiling installed on a high ceiling of a factory, a warehouse, a gym, a sports facility, or the like is placed in an environment having a high temperature, cooling of a light emitting element becomes more important. Therefore, a technique of providing a cooling fan for dissipating heat from the heat sink more efficiently has been proposed.
The following lighting device is disclosed in patent document 1. In addition, reference numerals in patent document 1 are shown in parentheses. The optical semiconductor lighting device (1000) is provided with a heat sink (300), a fan (400), and a light source module (500). When the fan (400) is determined to be malfunctioning because the fan (400) cannot be normally driven despite the supply of power to the fan (400), the illumination control unit (820) can control the light source module (500) so as to generate an arbitrary color, for example, red light, for notifying the malfunction of the fan (400), or can drive the light source module (500) so that the optical semiconductor element (520) blinks.
Prior art documents
Patent document
Patent document 1: japanese patent laid-open publication No. 2013-016520
Disclosure of Invention
Problems to be solved by the invention
In the above-described conventional technique, when it is determined that the cooling fan has failed, the illumination light turns red or flickers. Such an abnormal lighting state hinders the use of the space to be lighted.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an illumination system capable of detecting a phenomenon relating to at least one of a cooling fan and a light source unit of an illumination device, and capable of continuing to use an illuminated space even after the detection of the phenomenon.
Means for solving the problems
An illumination system according to the present invention is an illumination system including an illumination device and a terminal device configured to enable a user to remotely operate the illumination device, wherein the illumination device includes: a light source section having a light emitting element; a heat sink that dissipates heat of the light source unit; a cooling fan that generates an air flow that cools the radiator; and a control means that drives the light source unit and the cooling fan, wherein when at least one of a phenomenon related to a failure of the cooling fan, a phenomenon related to a lifetime of the cooling fan, and a phenomenon related to a lifetime of the light source unit occurs, the control means at least temporarily lights the light source unit in the notification lighting mode instead of the normal lighting mode, and can recognize the notification lighting mode and the normal lighting mode by human vision, and the terminal device can receive an operation for canceling the notification lighting mode.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, it is possible to detect a specific phenomenon relating to at least one of a cooling fan and a light source unit of an illumination device, and to continue using an illuminated space even after the detection of the specific phenomenon.
Drawings
Fig. 1 is a perspective view of an illumination device included in an illumination system according to embodiment 1, as viewed from obliquely above.
Fig. 2 is a perspective view of the lighting device shown in fig. 1, viewed obliquely from below.
Fig. 3 is a cut-away perspective view of the lighting device shown in fig. 1.
Fig. 4 is a functional block diagram of the lighting system according to embodiment 1.
Fig. 5 is a graph showing a relationship among a light beam emitted from the light emitting element, a light source current, and a light source temperature.
Fig. 6 is a flowchart showing a process executed by the control unit of the lighting device in embodiment 1.
Fig. 7 is a diagram showing a first example of a change in the light source current when the lighting mode is notified.
Fig. 8 is a diagram showing a second example of a change in the light source current when the lighting mode is notified.
Fig. 9 is a diagram showing a third example of a change in the light source current when the lighting mode is notified.
Fig. 10 is a perspective view of the lighting device included in the lighting system according to embodiment 2, as viewed from obliquely above.
Detailed Description
Hereinafter, embodiments will be described with reference to the drawings. In the drawings, the same reference numerals are given to the common or corresponding elements, and the overlapping description is simplified or omitted. The present disclosure may include all combinations of combinable structures among the structures described in the embodiments below.
Embodiment 1.
Fig. 1 is a perspective view of an illumination device 1A included in the illumination system according to embodiment 1, as viewed from obliquely above. Fig. 2 is a perspective view of the lighting device 1A shown in fig. 1, viewed obliquely from below. Fig. 3 is a sectional perspective view of the illumination device 1A shown in fig. 1. Fig. 4 is a functional block diagram of the lighting system according to embodiment 1. The lighting device 1A shown in fig. 1 to 3 is preferably used for illuminating a space below the lighting device 1A by being installed on a ceiling and irradiating light downward. In the following description, the up and down directions are determined based on the posture when the lighting device 1A is used. The lighting device 1A can be preferably used as a device that emits a light beam of, for example, several thousand lumens to several ten thousand lumens. The lighting device 1A is particularly suitable for use in a factory, a warehouse, a gymnasium, a sports facility, or the like.
The lighting device 1A includes a first base 2, a light-emitting element 3, a heat radiation fin 4, a second base 5, a cooling fan 6, and a power supply device 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 surface and the lower surface of the first base 2 are substantially horizontal. In the present embodiment, the shape of the first base 2 when viewed from a direction perpendicular to the first base 2 is rectangular or square. The first base 2 has a rib 2a formed at an edge portion. The rib 2a protrudes vertically upward with respect to the upper surface of the first base 2. The strength and rigidity of the first base 2 can be improved by providing the ribs 2 a.
As shown in fig. 2, a plurality of light emitting elements 3 are disposed below 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 so as to be thermally conductive to the lower surface of the first base 2. Heat generated by the light emitting element 3 is 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 a light source substrate (not shown) having the light emitting element 3 mounted on the lower surface thereof may be in contact with the lower surface of the first base 2 directly or via a thermally conductive material. The thermally conductive material may be any of thermally conductive grease, a thermally conductive sheet, a thermally conductive adhesive, and a thermally conductive double-sided tape, for example. 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. According to 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 made smaller and lighter. As the light emitting element 3, a white light-emitting COB type LED light source in which a plurality of blue LED bare chips are arranged and sealed with a resin material in which a yellow phosphor is mixed can be used.
In the present invention, it is needless to say that the light emitting element 3 may be other than a COB type LED light source, and various other LEDs may be used. For example, the light emitting element 3 may be a surface mount type LED package, a shell type LED package, a light distribution lens LED package, or a chip-scale packaged LED. By disposing a plurality of LED packages necessary for obtaining a desired light flux in a dispersed manner, it is possible to suppress an increase in the temperature of the light source, and to obtain the illumination device 1A with higher efficiency. The light-emitting element 3 is not limited to the LED, and may include, for example, an organic Electroluminescence (EL) element, a semiconductor laser, or the like.
As shown in fig. 1 and 3, a plurality of heat dissipation fins 4 are arranged on the first base 2. The first base 2 and the heat radiation fins 4 cool the light emitting element 3 by radiating heat generated by the light emitting element 3 to the surrounding air. The first base 2 and the heat radiation fins 4 correspond to a heat sink. The heat radiating fins 4 protrude from the upper surface of the first base 2. The heat radiating fins 4 are perpendicular to the upper surface of the first base 2. The heat radiation fins 4 in the present embodiment have a plate-like shape. The plurality of heat dissipating fins 4 are arranged in parallel with each other. The heat radiation fins 4 may be pin fins having a pin shape instead of the illustrated configuration. Heat generated by the light emitting element 3 is conducted to the first base 2, and further conducted from the first base 2 to the heat radiation fins 4. Heat is dissipated from the surfaces of the first base 2 and the heat dissipating fins 4 to the surrounding air. By increasing the surface area of the heat sink using the first base 2 and the heat radiation fins 4, 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, that is, the light emitting efficiency of the light emitting element 3 is improved, and the life of the light emitting element 3 can be extended. As a modification, a heat pipe that moves heat from the first base 2 to the heat radiation fins 4 may be provided.
Preferably, the first base 2 and the heat radiating fins 4 are made of a metal material that is lightweight and has high thermal conductivity. Examples of such a metal material include aluminum, aluminum alloys, copper alloys, and stainless steel. The heat dissipation fin 4 of the present embodiment is manufactured by bending a thin metal plate. This can reduce the weight. The heat radiation fins 4 may be fixed to the first base 2 by any method such as caulking, screwing, bonding, welding, or soldering. The first base 2 and the heat radiating fins 4 may be integrally formed by, for example, die casting.
A second base 5 is disposed above the plurality of heat radiating 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 such as a lattice shape. The second base 5 covers the upper side of the plurality of heat radiating fins 4 without contacting the plurality of heat radiating fins 4. According to the present embodiment, the following effects can be obtained by providing the second base 5. By receiving the dust, oil, or the like falling from above the lighting device 1A with the second base 5, it is possible to prevent the dirt made of the dust, oil, or the like from adhering to and accumulating on the upper surface of the first base 2 and the surfaces of the plurality of heat radiating fins 4. The reduction in the heat radiation efficiency of the first base 2 and the heat radiation fins 4 due to the influence of the dirt can be reliably reduced. When the lighting device 1A is installed at a high position such as a ceiling, it is difficult to frequently clean the first base 2 and the heat radiation fins 4. Even if the first base 2 and the heat radiating fins 4 are not cleaned frequently, the second base 5 can prevent the dirt from accumulating on the upper surface of the first base 2 and the heat radiating fins 4 and the surfaces of the plurality of heat radiating fins 4.
In the present embodiment, the second base 5 substantially covers the entire first base 2 when viewed from above. The second base 5 is disposed in parallel with 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 radiating fins 4. In the present embodiment, the second base 5 has a rectangular or square shape when viewed from above. The second base 5 has ribs 5a and 5b formed on the edge. The ribs 5a, 5b protrude vertically downward with respect to the lower surface of the second base 5. The strength and rigidity of the second base 5 can be improved by providing the ribs 5a and 5 b.
A first vent 8 and a second vent 9 are formed between the first base 2 and the second base 5. A plurality of heat radiating fins 4 are located between the first air vent 8 and the second air vent 9. The cooling fan 6 generates an air flow for cooling the first base 2 and the heat dissipating fins 4. The cooling fan 6 is disposed facing the first air vent 8. The first air vent 8 and the second air vent 9 are located on opposite sides of the plurality of fins 4. The surface of each 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 including 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 of the airflow blown out from the cooling fan 6 is parallel to the first and second bases 2 and 5. The lower end of the cooling fan 6 is located at substantially the same height as the first base 2. The upper end of the cooling fan 6 is located at substantially the same height as the second base 5.
The power supply device 7 is fixed to the second base 5. The power supply device 7 includes a light source drive circuit 7a and a fan drive circuit 7b, the light source drive circuit 7a supplies a current for lighting the light emitting elements 3, and the fan drive circuit 7b supplies a current for driving the cooling fan 6. As shown in fig. 3, the power supply device 7 includes an electronic circuit board 7c and a power supply housing 7 d. An electronic circuit board 7c is housed in the power supply housing 7 d. The power supply housing 7d has a substantially rectangular parallelepiped shape. The electronic circuit board 7c includes, for example, electric components generating heat, such as a semiconductor element, a reactor, a resistor, and a capacitor. The electronic circuit board 7c constitutes a light source drive circuit 7a and a fan drive circuit 7 b. 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, the fan drive circuit 7b may be provided inside the cooling fan 6.
The bottom of the power supply device 7 is supported by the second base 5. The bottom surface of the power supply frame 7d is in contact with the upper surface of the second base 5. The bottom surface of the power supply housing 7d may be in contact with the upper surface of the second base 5 via a heat conductive material. The thermally conductive material is the same as the above-described material. As a modification, the bottom surface of the power supply housing 7d may be integrated with the second base 5. Heat generated from the electric components of the power supply device 7 is transferred to the power supply housing 7d, and dissipated from the surface of the power supply housing 7d to the surrounding air. A part of the heat transferred to the power supply frame 7d is further conducted to the second base 5, and is dissipated from the surface of the second base 5, particularly the lower surface of the second base 5, to the air. By cooling the power supply device 7 in this manner, a decrease in the efficiency of the power supply device 7 can be prevented.
When the cooling fan 6 is operated, the following is the case. The air flow generated by the cooling fan 6 passes through the first air vent 8 and the second air vent 9. Cooling fan 6 sends air outside lighting device 1A from first air vent 8 to the internal space of 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 to the outside of the lighting device 1A through the second air vent 9. Thus, air flows in the space between the first and second vents 8 and 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 heat dissipation fin 4, and an air flow flowing along the lower surface of the second base 5. By flowing the air flow generated by the cooling fan 6 along the upper surface of the first base 2 and the surface of the heat radiation fins 4, the heat of the light emitting element 3 can be dissipated more efficiently, and the temperature of the light emitting element 3 can be further reduced. By the airflow generated by the cooling fan 6 flowing along the lower surface of the second base 5, the heat of the power supply device 7 can be dissipated more efficiently, and a decrease in the efficiency of the power supply device 7 can be prevented more reliably. In the present embodiment, substantially the entire amount of air blown out from the cooling fan 6 flows into the internal space of the lighting device 1A through the first air vent 8. That is, substantially the entire amount of air blown out from the cooling fan 6 passes through the space between the first base 2 and the second base 5.
The support column 10 connects the first base 2 and the second base 5. The pillar 10 has a lower end fixed to the first base 2 and an upper end fixed to the second base 5. The first base 2 and the second base 5 are provided with support columns 10 at their four corners, respectively. That is, the first base 2 and the second base 5 are connected by four support columns 10. The strength and rigidity of the illumination device 1A can be improved by the support column 10 and the second base 5. The support column 10 and the second base 5 can reliably support the weight of the power supply device 7. When the lighting device 1A is used in a gym or a sports facility, a ball for sports may fly toward the lighting device 1A and collide with it. Even if the ball collides with the illumination device 1A, as described above, the strength and rigidity of the illumination device 1A are improved, so that damage to the illumination device 1A can be reliably reduced. In the present embodiment, the support column 10 has an L-shaped cross-sectional shape. Thereby, the column 10 is lightweight and highly rigid. The fixing method between the pillar 10 and the first base 2 and the second base 5 may be any method such as screwing, welding, brazing, bonding, fitting, and the like.
The first air 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 support columns 10. The second air vent 9 is formed by being surrounded by 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 pillars 10.
According to the present embodiment, convection is generated by the cooling fan 6, so that both the light-emitting element 3 and the power supply device 7 as heat generation sources can be efficiently cooled at the same time. As shown in fig. 3, in the present embodiment, the direction D1 of the forced convection by the cooling fan 6 is a direction from the cooling fan 6 toward the heat radiation fins 4. As a modification, the opposite direction, that is, the direction from the heat radiation fins 4 to the cooling fan 6 may be the direction of the forced convection by the cooling fan 6. By convecting the cold air flowing from the outside by the cooling fan 6, the air receiving the heat from the first base 2, the heat radiation fins 4, and the second base 5 can be efficiently discharged to the outside space of the lighting device 1A. This can lower the temperature of the light-emitting element 3 and the power supply device 7. 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 of fixing the cooling fan 6 may be any method such as screw fastening, bonding, welding, snap fitting, housing into a holder, or the like. In the example shown in fig. 1, the following configuration is adopted. The cooling fan 6 is attached to the rib 2a on the side facing the cooling fan 6 among the four sides of the first base 2 and the rib 5b on the side facing the cooling fan 6 among the four sides of the second base 5 by a plurality of screws 16. The cooling fan 6 has a square frame as viewed from the direction of the fan rotation axis, and screws 16 are inserted through holes formed at four corners of the frame.
Fig. 3 corresponds to a cross-sectional view of the lighting device 1A taken along a plane perpendicular to the first base 2 and including the center line of the cooling fan 6. In other words, fig. 3 corresponds to a cross-sectional view obtained by cutting the lighting device 1A with a plane parallel to the direction D1 of the forced convection by the cooling fan 6 and perpendicular to the first base 2.
As a modification, instead of the axial flow fan of the present embodiment, a centrifugal fan, a diagonal 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 fan of a forced air cooling system. Cooling fan 6 may be disposed such that its outlet port or inlet port faces first air vent 8.
As shown in fig. 1, the lighting device 1A of 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 provided on both sides of the first base 2. First support members 11 are provided on two parallel sides of the four sides of the first base 2 on which the first and second ventilation openings 8 and 9 are not formed, respectively. The fixing method between the first support 11 and the first base 2 may be any method such as screw fastening, welding, brazing, bonding, fitting, and the like. The first support 11 may be fixed to both the first base 2 and the second base 5. In addition, the first support 11 may be integrated with the first base 2.
The second support 12 has an elongated plate-like fixed portion 12a and a pair of arm portions 12b protruding from both ends of the fixed portion 12 a. Each arm portion 12b protrudes in a direction perpendicular to the longitudinal direction of the fixed portion 12 a. A long hole 12c curved in an arc shape is formed at the tip end portion of each arm portion 12 b. The second support 12 is rotatably coupled to the first support 11. The position of the rotation axis of the second support 12 is a position along the center of the circle of the arc of the long hole 12 c. A bolt, not shown, is screwed to the screw hole of the first support 11 through the long hole 12c, thereby firmly fixing the second support 12 without rotating with respect to the first support 11. The fixing portion 12a of the second stay 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 bolt for fixing. In the state of fig. 1, the fixing portion 12a is parallel to the first base 2 and the second base 5. In the case where the mounting surface is horizontal, the fixing portion 12a of the second stay 12 is fixed to the mounting surface in the state of fig. 1. Thus, the lighting device 1A is fixed to the mounting surface in an appropriate posture by the first stay 11 and the second stay 12. In the case where the mounting surface is an inclined surface inclined with respect to the horizontal plane, the angle of the second stay 12 with respect to the first stay 11 can be changed so that the arm portion 12b of the second stay 12 is perpendicular to the inclined surface. That is, when a bolt (not shown) passing through the elongated hole 12c of the arm portion 12b is loosened, the second stay 12 can be rotated with respect to the first stay 11, and the second stay 12 can be tilted with respect to the first stay 11. When the second support member 12 is tilted with respect to the first support member 11, the bolt is relatively moved with respect to the long hole 12 c. By tightening the bolt again, the second support member 12 can be fixed to the first support member 11 at an arbitrary inclination angle. When the mounting surface is an inclined surface, the second stay 12 is inclined with respect to the first stay 11 and fixed to the first stay 11, whereby the lighting device 1A can be set in an appropriate posture.
Preferably, the second base 5, the power supply frame 7d, the support column 10, the first support 11, and the second support 12 are made of a metal material having high strength and thermal conductivity. Examples of the metal material include aluminum, aluminum alloy, and stainless steel.
As shown in fig. 3, the lighting device 1A includes a cable 13 for supplying power from the power supply device 7 to the light emitting element 3. It is preferable that the cable 13 is covered with a rubber-like material or the like so as to have waterproofness. When a current flows from the power supply device 7 to the light emitting element 3 through the cable 13, the light emitting element 3 is turned on. Fig. 3 shows a state in which the cable 13 is cut halfway. 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 flowing current from the power supply device 7 to the cooling fan 6 through the cable.
As shown in fig. 2 and 3, the illumination device 1A of the present embodiment includes a reflector 14 and a light-transmitting cover 15. The reflector 14 forms a reflection surface around each light emitting element 3. The reflecting surface is formed in a conical surface shape around the light emitting surface of each light emitting element 3. The reflecting surface of the reflector 14 reflects downward light emitted laterally from each light emitting element 3. This can increase the amount of light emitted downward from the illumination device 1A. Preferably, at least the reflecting surface of the reflector 14 is made of a white material or a white-based coated material having a high reflectance and a low absorptance.
The light-transmitting cover 15 is fixed below the first base 2. The light-transmitting cover 15 covers the entire 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 translucent cover 15 and are emitted to the outside of the illumination device 1A. The light-transmitting cover 15 reliably protects the light-emitting element 3 and the reflector 14 from dirt, water, and the like. By providing the light-transmitting cover 15, deterioration or failure of the light-emitting element 3 can be reliably prevented. Preferably, the light-transmissive cover 15 is made of a transparent material that transmits light entirely. Alternatively, the light-transmitting cover 15 may be a member that diffuses and transmits light. The light-transmitting cover 15 can be made of a resin material such as a polycarbonate resin, an acrylic resin, or a polystyrene resin, or a glass material. A coating treatment such as a hard coating treatment which is advantageous in suppressing the deterioration with time may be applied to the surface of the light-transmitting cover 15. The light-transmitting cover 15 may also have waterproofness. The joint between the translucent 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 embodiment 1 includes a lighting device 1A and a terminal device 60, and the terminal device 60 is configured such that a user can remotely operate the lighting device 1A. The details of the terminal device 60 will be described later. In the present embodiment, the power supply device 7 includes a control unit 7e in addition to the light source drive circuit 7a and the fan drive circuit 7 b. The control unit 7e drives the light source unit 17 via the light source drive circuit 7 a. The control unit 7e drives the cooling fan 6 via the fan drive circuit 7 b. The control unit 7e includes a processor 7f and a memory 7 g. Typically, the control unit 7e has a structure including a microcomputer. The control unit 7e is provided in the power supply housing 7 d. The control unit 7e is provided on the electronic circuit board 7 c. As a modification, the electronic circuit board constituting the control unit 7e may be separated from the electronic circuit boards constituting the light source drive circuit 7a and the fan drive circuit 7 b.
The light source section 17 is constituted by a plurality of light emitting elements 3. In the example of fig. 4, the light source section 17 has a plurality of light emitting elements 3 connected in series. Instead of this example, the plurality of light emitting elements 3 in the light source unit 17 may be connected in parallel or in series-parallel.
The light source driving circuit 7a causes a current to flow through the light emitting element 3 of the light source section 17. The light source driving 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 a switching power supply using a semiconductor switching element, for example. Typically, the ac power supply 100 is a commercial power supply. The light source driving circuit 7a can adjust the light beam emitted from the light emitting element 3 by adjusting the current flowing through the light emitting element 3 in accordance with an instruction from the control unit 7 e. This allows adjustment of the illuminance and luminance of the illumination device 1A.
Hereinafter, the temperature related to the temperature of the light emitting element 3 of the light source unit 17 is 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 a light source temperature detecting means. The temperature of the first base 2 or the heat radiation fins 4 is correlated with the temperature of the light emitting element 3. Therefore, the light source temperature sensor 18 is attached to the first base 2 or the heat radiation fin 4, whereby the light source temperature can be detected. Alternatively, the light source temperature sensor 18 may be mounted on 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 of the light source temperature detected by the light source temperature sensor 18.
The fan drive circuit 7b supplies electric power to the motor of the cooling fan 6 in accordance with a command from the control unit 7 e. The fan drive circuit 7b can adjust the rotation speed of the cooling fan 6 by adjusting at least one of the current, voltage, and frequency of the electric 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". The cooling fan 6 is provided with a fan speed sensor 19 for detecting a fan speed. The fan speed sensor 19 is an example of a fan speed detecting means.
In the following description, the current value of the dc 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 7 b. The control unit 7e can control the light source current by controlling the light source driving circuit 7a based on the information of 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 driving circuit 7a based on the information of the light source temperature detected by the light source temperature sensor 18. 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 graph showing a relationship among the light beam emitted from 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. When the light source current is increased, the light beam increases. When the light source current is equal, the light beam becomes larger under the condition that the light source temperature is low, as compared with the condition that the light source temperature is high. In order to obtain a predetermined light beam, it is necessary to control the light source current and control the light source temperature.
In the present embodiment, the control unit 7e controls the light source driving circuit 7a based on the information of the light source temperature, thereby controlling both the light source current and the light source temperature. An example of the control is explained below.
Example 1 as described above, both the light source current and the light source temperature need to be controlled in order to obtain a predetermined light flux. For example, when the light source driving circuit 7a is controlled so that the light source current is constant, the light source temperature needs to be constant because the light beam changes according to the change in the light source temperature. In this case, the control unit 7e can control the fan speed of the cooling fan 6 by the fan drive circuit 7b so that the light source temperature detected by the light source temperature sensor 18 becomes constant, thereby making the light source temperature constant. That is, the control unit 7e controls the light source drive circuit 7a and the fan drive circuit 7b so that the light source current is constant and the light source temperature is constant, thereby providing the illumination device 1A capable of obtaining a constant light flux. By obtaining a constant light flux, constant illuminance and luminance can be obtained. As a modification, the control unit 7e may control the cooling fan 6 to be turned on/off so that the light source temperature detected by the light source temperature sensor 18 becomes constant.
As another example, assume a case where the illumination device 1A is turned on in a range where the light source temperature is equal to or lower than a predetermined temperature. The predetermined temperature is a temperature within a temperature range in which the light emitting element 3 can be used, and when the light emitting element 3 is turned on at the predetermined temperature for a long time, a desired light flux can be obtained and a desired life time can be achieved. When the lighting device 1A is turned on in a range where the light source temperature is equal to or lower than the predetermined temperature, the control unit 7e controls the light source drive circuit 7a and the fan drive circuit 7b so that the light source current is decreased as the light source temperature is lower and the light source current is increased as the light source temperature is higher, thereby obtaining a constant light flux. By obtaining a constant light flux, constant illuminance and luminance can be obtained. According to example 2, at least one of the operating time and the fan speed of the cooling fan 6 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 control unit 7e is configured to be capable of 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 operation by a user and a display 62 for displaying characters, graphics, symbols, and the like to notify information. The operation unit 61 may include, for example, buttons or keys. The terminal device 60 can transmit instructions related to, for example, turning on/off, dimming, and the like of the lighting device 1A to the control unit 7e in accordance with a user operation. The display 62 is an example of a notification member. For example, the operation unit 61 and the display 62 may be integrally formed by a touch panel. The terminal device 60 may include other notification means such as a voice output device in addition to the display 62, or may include other notification means instead 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 terminal that can be moved. The terminal device 60 and the control unit 7e may be capable of direct communication. The terminal device 60 and the control unit 7e may be capable of indirectly communicating via another device such as a controller of a lighting control system.
The control unit 7e can detect at least one of a phenomenon related to a failure of the cooling fan 6, a phenomenon related to the lifetime of the cooling fan 6, and a phenomenon related to the lifetime of the light source unit 17. In the following description, the above-described phenomenon that the control unit 7e can detect is referred to as a "specific phenomenon". In the case where a specific phenomenon related to the cooling fan 6 occurs, it may be considered that the cooling fan 6 needs to be inspected, repaired, or replaced. When a specific phenomenon related to the light source unit 17 occurs, it is considered that the light source unit 17 needs to be inspected, repaired, or replaced. In the following description, at least one of the cooling fan 6 and the light source unit 17 may be collectively referred to as "maintenance". When a specific phenomenon occurs, the control unit 7e at least temporarily turns on the light source unit 17 in the notification lighting mode instead of the normal lighting mode. The notification of the illumination state in the lighting mode and the illumination state in the normal lighting mode can be recognized by human vision. Therefore, by lighting the light source unit 17 in the notification lighting mode, the occurrence of the specific phenomenon can be reliably notified to the user. That is, when the user observes that the light source section 17 is lit in the notification lighting mode, the user can know that maintenance is necessary.
The terminal device 60 can accept an operation for the user to cancel the notification lighting mode. The terminal device 60 can transmit a release instruction for releasing the light source unit 17 to notify the lighting mode of lighting in accordance with a user operation. When the user wants to end the notification in the notification lighting mode, the user can operate the terminal device 60 to transmit a release command from the terminal device 60. The control unit 7e receives the release instruction. Upon receiving the release instruction, the control unit 7e causes the light source unit 17 not to light in the notification lighting mode. Upon receiving the release instruction, 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 vision of the user than the illumination state in the normal lighting mode. Therefore, when the light source unit 17 is turned on in the notification lighting mode, there is a possibility that the use of the space illuminated by the illumination device 1A is hindered. After the occurrence of the specific phenomenon is once notified to the user, 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 and light the light source unit 17 in the normal lighting mode by transmitting a release instruction from the terminal device 60. This enables the space illuminated by the illumination device 1A to be used without any problem even after a specific phenomenon has occurred.
When a specific phenomenon occurs, maintenance of the lighting device 1A may not be performed immediately. In particular, when the lighting device 1A is installed on a high ceiling of a factory, a warehouse, a gym, a sports facility, or the like, it takes time for preparation because it is necessary to assemble a scaffold or the like. According to the present embodiment, by transmitting the cancel command from the terminal device 60 in response to the user operation, the space illuminated by the illumination device 1A can be used without any trouble from the occurrence of the specific phenomenon to the execution of the maintenance.
Fig. 6 is a flowchart showing a process executed by the control unit 7e of the illumination device 1A in embodiment 1. The control unit 7e periodically repeats the processing of the present flowchart.
In step S1, the control unit 7e determines whether or not a specific phenomenon is detected. Further, the processing for detecting a specific phenomenon is described later. When the specific phenomenon is not detected, the process proceeds from step S1 to step S2, and the controller 7e controls the light source driving circuit 7a so that the light source unit 17 is turned on in the normal lighting mode. After step S2, the control unit 7e ends the present processing loop. On the other hand, when the specific phenomenon is detected in step S1, the process proceeds to step S3, and the controller 7e controls the light source driving circuit 7a so that the light source unit 17 is turned on in the notification lighting mode.
The process proceeds from step S3 to step S4, and the control unit 7e determines whether or not the release instruction transmitted from the terminal device 60 has been received. If the release instruction has not been received, the process returns to step S3 to continue notifying the lighting mode. On the other hand, when the release instruction is received in step S4, the process proceeds to step S5, and the control unit 7e releases the notification lighting mode. When the notification lighting mode is canceled, the control unit 7e controls the light source drive circuit 7a to light the light source unit 17 in the normal lighting mode, instead of lighting the light source unit 17 in the notification lighting mode. After step S5, the control unit 7e ends the present processing loop.
An example of processing for the control unit 7e to detect a specific phenomenon is described below.
(example 1) the control section 7e may detect a failure of the cooling fan 6 as a specific phenomenon in the following manner. When the fan speed detected by the fan speed sensor 19 is zero or extremely low in a state where the control unit 7e instructs the cooling fan 6 to be operated via the fan drive circuit 7b, it is considered that the cooling fan 6 has failed. Therefore, the control unit 7e can detect a failure of the cooling fan 6 by comparing the fan speed detected by the fan speed sensor 19 with a reference. Since it is difficult to directly observe the state of stop or operation of the cooling fan 6 in the case where the lighting device 1A is installed on a high ceiling, it is difficult for the user to detect a failure of the cooling fan 6. In this case, by setting in the above manner, it is also possible to automatically detect a failure of the cooling fan 6.
When an abnormality of the cooling fan 6 is detected, the control unit 7e may control the light source driving circuit 7a so that the light source current is lower than that in the case where the abnormality of the cooling fan 6 is not detected. When an abnormality of the cooling fan 6 is detected, the control unit 7e may decrease the light source current so that the light source temperature detected by the light source temperature sensor 18 becomes equal to or lower than a predetermined temperature. By providing as described above, when an abnormality occurs in the cooling fan 6, the light source temperature can be reliably prevented from increasing greatly, and therefore thermal degradation of the light emitting element 3 can be reliably prevented.
(example 2) the control section 7e may detect the life of the cooling fan 6 as a specific phenomenon in the following manner. The motor provided in the cooling fan 6 has a bearing. In general, it is considered that the life of the bearing depends on the accumulated running time or the accumulated number of revolutions. The control unit 7e can calculate the integrated number of revolutions of the cooling fan 6 based on the fan speed detected by the fan speed sensor 19 and the operating time of the cooling fan 6. When the cumulative operation time or the cumulative number of revolutions of cooling fan 6 exceeds the reference value, control unit 7e detects that cooling fan 6 has reached the end of its life, that is, that the time at which cooling fan 6 should be replaced has come. By providing in the above manner, it is possible to urge the user to replace the cooling fan 6 before the cooling fan 6 fails due to the aged deterioration.
(example 3) the control section 7e can detect the lifetime of the light source section 17, that is, the lifetime of the light emitting element 3 as a specific phenomenon in the following manner. The lifetime of the light source unit 17 is considered to depend on the light source current, the light source temperature, and the lighting time of the light source unit 17. The lifetime of the light source unit 17 tends to be shorter as the light source current is larger. The lifetime of the light source unit 17 tends to be shorter as the light source temperature is higher. The light source driving 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 the light source current detection means. The control unit 7e can detect the lifetime 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 cumulative lighting time of the light source unit 17. At this time, the control unit 7e adds a weight for correcting the influence of the difference in the light source current and a weight for correcting the influence of the difference in the light source temperature, and calculates the cumulative lighting time of the light source unit 17. When the cumulative lighting time exceeds the reference value, the control unit 7e detects that the light source unit 17 has reached the end of its life, that is, that the time at which the light source unit 17 should be replaced has come. By providing the above configuration, it is possible to urge the user to replace the light source unit 17 before the light source unit 17 fails due to aging deterioration. As a modification, the control unit 7e may detect the lifetime 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. Even in a use environment in which the change in the light source current and the light source temperature is small, the lifetime of the light source unit 17 can be detected with high accuracy by this modification.
Fig. 7 is a diagram showing a first example of a change in the light source current when the lighting mode is notified. In fig. 7 to 9, t on the horizontal axis represents time, and I on the vertical axis represents the light source current. In the first example shown in fig. 7, the following is the case. The notification lighting pattern is a pattern in which the blinking of the light source unit 17 is repeated. The control unit 7e controls the light source driving circuit 7a so that the light source current periodically changes to zero and a constant value larger than zero. The period of the flicker of the light source unit 17 is set to a length that enables human visual perception of the flicker. In fig. 7, the light source current is changed in a rectangular wave. As a modification, the light source current may also be changed gradually between zero and a value greater than zero.
Fig. 8 is a diagram showing a second example of a change in the light source current when the lighting mode is notified. In this second example, the following is the case. The notification lighting pattern is a pattern that repeats the intensity of the light output of the light source unit 17. The control unit 7e controls the light source driving 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 the intensity of the light output of the repetitive light source unit 17 is set to a length that enables a human to visually perceive a change in the intensity of the light output. In fig. 8, the light source current is changed in a rectangular wave.
Fig. 9 is a diagram showing a third example of a change in the light source current when the lighting mode is notified. This third example is a modification of the second example described above. The third example is the same as the second example except that the light source current gradually changes between a first value and a second value larger than the first value.
The lighting mode is generally a mode in which the luminance is perceived by human vision in a temporally constant manner. By setting the mode in which the blinking of the light source unit 17 or the intensity of the light output is repeated as described above as the notification lighting mode, the user can easily and reliably recognize the difference from the normal lighting mode. Therefore, the occurrence of the specific phenomenon can be reliably notified to the user.
As a modification, the control unit 7e may control the light source driving circuit 7a so that the color of the light irradiated from the light source unit 17 in the notification lighting mode is different from the color of the light irradiated from the light source unit 17 in the normal lighting mode. For example, by providing a plurality of types of light emitting elements 3 having different emission colors in the light source section 17 and making the ratio of the amounts of light from the light emitting elements 3 having different emission colors different between the notification lighting mode and the normal lighting mode, the light color in the notification lighting mode can be made different from the light color in the normal lighting mode. In the case of this modification, the user can easily and reliably recognize the notification lighting mode and the normal lighting mode according to the difference in color of the light emitted from the light source unit 17. When the light color of the normal lighting mode is a white region, the light color of the notification lighting mode may be a region other than the white region, such as a red region, a green region, a yellow region, or a blue region. In the case where the light color of the notification lighting mode is different from the light color of the normal lighting mode, the luminance in the notification lighting mode may be visually perceived by a human being in a temporally constant manner. Alternatively, the light color of the notification lighting mode may be different from the light color of the normal lighting mode, and the blinking of the light source section 17 or the intensity of the light output may be repeated in the notification lighting mode. This makes it possible for the user to recognize that the notification lighting mode is different from the normal lighting mode very easily and reliably.
When the specific phenomenon is detected, the control unit 7e may cause the light source unit 17 to be constantly turned on in the notification lighting mode. Alternatively, when the specific phenomenon is detected, the control unit 7e may cause the light source unit 17 to be temporarily turned on in the notification lighting mode, and otherwise cause the light source unit 17 to be turned on in the normal lighting mode. If the light source unit 17 is temporarily turned on in the notification lighting mode, the occurrence of a specific phenomenon can be notified to the user. Therefore, it is not necessary to always light the light source unit 17 in the notification lighting mode.
When a specific phenomenon occurs, the control unit 7e may turn on the light source unit 17 in the notification lighting mode at a predetermined timing and turn on the light source unit 17 in the normal lighting mode at a timing other than the predetermined timing. For example, it may be set in the following manner. As a first example, the light source unit 17 may be turned on in the notification lighting mode for a predetermined time period from the start of lighting of the lighting device 1A, and then 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 otherwise, the light source unit 17 may be turned on in the normal lighting mode. For example, the light source unit 17 may be turned on in the notification lighting mode for several minutes at 30-minute intervals or 1-hour intervals, and otherwise, the light source unit 17 may be turned on in the normal lighting mode. As a third example, the light source unit 17 may be turned on in the notification lighting mode at a predetermined timing, and the light source unit 17 may be turned on in the normal lighting mode otherwise.
The control unit 7e may be configured to detect two or more of a phenomenon related to a failure of the cooling fan 6, a phenomenon related to a lifetime of the cooling fan 6, and a phenomenon related to a lifetime of the light source unit 17 as specific phenomena. In the following description, the control unit 7e can detect at least two specific phenomena. The two specific phenomena detected by the control unit 7e are referred to as a "first specific phenomenon" and a "second specific phenomenon". In this case, the setting may be as follows. The control unit 7e has a first notification lighting mode and a second notification lighting mode as notification lighting modes. The illumination state in the first notification lighting mode and the illumination state in the second notification lighting mode can be visually recognized by a human. For example, it may be set in the following manner. In the notification lighting mode, the mode in which the blinking of the light source unit 17 is repeated may be set as the first notification lighting mode, and the mode in which the intensity of the light output of the light source unit 17 is repeated may be set as the second notification lighting mode. Alternatively, the control unit 7e may control the light source driving circuit 7a so that the color of the light emitted from the light source unit 17 in the first notification lighting mode is different from the color of the light emitted from the light source unit 17 in the second notification lighting mode.
When the first specific phenomenon occurs, the control unit 7e at least temporarily turns on the light source unit 17 in the first notification lighting mode instead of the normal lighting mode. When the second specific phenomenon occurs, the control unit 7e at least temporarily turns on the light source unit 17 in the second notification lighting mode instead of the normal lighting mode. This can provide the following effects. Since the user can easily visually recognize whether the first notification lighting mode or the second notification lighting mode is present, it can be easily and reliably known which of the first specific phenomenon and the second specific phenomenon is present. At least one of a phenomenon related to a failure of the cooling fan 6 and a phenomenon related to the lifetime of the cooling fan 6 may be set as a first specific phenomenon, and a phenomenon related to the lifetime of the light source unit 17 may be set as a second specific phenomenon. Thus, the user can easily and reliably know whether a phenomenon related to the failure or the lifetime of the cooling fan 6 or a phenomenon related to the lifetime of the light source unit 17 has occurred.
When a specific phenomenon occurs, the terminal device 60 may notify the user of the occurrence of the specific phenomenon. For example, it may be set in the following manner. When the specific phenomenon is detected, the control unit 7e transmits a command for notifying the terminal device 60 of the occurrence of the specific phenomenon. The terminal device 60 that has received the instruction notifies the user of the occurrence of the specific phenomenon by using, for example, a display on the display 62 or a voice from the voice output device. This makes it possible to more reliably notify the user of the occurrence of the specific phenomenon. When the control unit 7e can detect a plurality of specific phenomena, the user may be notified of which specific phenomenon has occurred from the terminal device 60.
Since the cooling fan 6 is operated during the time period in which the lighting device 1A is turned on, dust is less likely to accumulate on the first base 2. However, in a turning-off period which is a period in which the lighting device 1A is turned off, dust may be accumulated on the first base 2. As the turning-off period, for example, a late night period may be cited. The rest day of a facility such as a factory or a warehouse in which the lighting device 1A is used may correspond to the turning-off period. The period of continuous or long-term rest of the facility may correspond to the extinction time period. In this case, the extinguishing period spans multiple days. Since the control unit 7e controls the light-on of the light source unit 17 via the light source drive circuit 7a, it is needless to say that the turning-off period can be detected. Further, the control unit 7e may store information on the turning-off time period, for example, the holiday of the facility.
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 turning-off period. This can provide the following effects. Dust adhering to the first base 2 in the extinguishing period can be blown off and removed by the wind of the cooling fan 6. Therefore, since dust can be prevented from accumulating on the first base 2, a decrease in heat dissipation efficiency of the first base 2 can be prevented. As a result, the temperature of the light emitting element 3 can be more reliably prevented from increasing.
The control unit 7e may control the fan drive circuit 7b such that the fan speed during the operation of the cooling fan 6 in the turn-off period is higher than the fan speed in the period in which the lighting device 1A is turned on. This can more reliably prevent dust from accumulating on the first base 2 during the extinguishing period. Since the possibility that the user is in the vicinity is high in the period in which the lighting device 1A is turned on, when the fan speed is increased, there is a possibility that the user can hear the noise of the cooling fan 6. On the other hand, if the fan speed is increased, the noise of the cooling fan 6 does not become a problem, because the user is not present if the fan speed is increased, particularly if the fan speed is increased over a long period of time.
The control unit 7e may control the cooling fan 6 to operate temporarily when the time for which the lighting device 1A is turned off exceeds a reference time, thereby preventing dust from accumulating in the first base 2. The reference may be, for example, 12 hours or 24 hours.
The control unit 7e may control the light source drive circuit 7a and the fan drive circuit 7b based on information received from an environment sensor (not shown) that detects information on the environment in which the lighting device 1A is used or the environment in which light from the lighting device 1A is received. That is, the control unit 7e may control lighting, turning off, dimming, and the like of the light emitting element 3 or control operation of the cooling fan 6 based on information detected by the environment sensor. The environment sensor may be at least one of an air temperature sensor for detecting an air temperature of the environment, a brightness sensor for detecting a brightness of the environment, and a human detection sensor for detecting a human in the environment. For example, it may be set in the following manner.
The air temperature is detected by an air temperature sensor as an environment sensor, and when the air temperature is relatively high, the control unit 7e may control the fan speed of the cooling fan 6 to be higher than when the air temperature is relatively low. The brightness of the environment may be detected by a brightness sensor as an environment sensor, and the control unit 7e may increase or decrease the light output from the lighting device 1A so that the brightness of the environment becomes constant. When the human detection sensor as the environment sensor detects a human, the control unit 7e may turn on the lighting device 1A. When the human detection sensor does not detect a human, the control unit 7e may dim or turn off the lighting device 1A.
Further, according to embodiment 1, the following effects are achieved.
(effect 1) by disposing 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 the fan is disposed above the heat dissipating fins 4 or above the power supply device 7, it is necessary to provide a space for installing the fan, and the height of the lighting device 1A is increased by at least the thickness of the fan. Compared to such a structure, the height dimension of the lighting device 1A can be reduced. As a result, workability when the lighting device 1A is installed on a ceiling or the like becomes good. Further, the amplitude of the lighting device 1A during an earthquake 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 heat radiation fins 4, and the power supply device 7. This enables both the light-emitting element 3 and the power supply device 7 to be efficiently cooled. As a result, the light-emitting element 3 can be made more efficient, longer in life, and more highly luminous. In addition, the heat sink including the first base 2 and the heat radiating fins 4 can be made smaller and lighter. Further, the power supply device 7 can be downsized and highly efficient.
(effect 3) by disposing the cooling fan 6 on the side surface of the lighting device 1A, the air passage can be efficiently formed by the plurality of plate-like heat radiating fins 4 disposed in parallel. A heat sink including a plurality of plate-like heat radiating 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. In contrast, in the case of a structure in which the fan is disposed above the heat sink, in order to effectively secure the air passage, it is necessary to provide relatively expensive pin fins or select a cast heat sink that is easily heavy.
(effect 4) in the power supply device 7, the control unit 7e can control both the light source drive circuit 7a that lights the light emitting elements 3 and the fan drive circuit 7b that drives the cooling fan 6, and thereby the following effects can be obtained. The cooling fan 6 can be appropriately driven in accordance with the setting environment. The fan speed of the cooling fan 6 can be controlled according to the ambient temperature of the lighting device 1A or the light source temperature. Even in an environment such as a factory where high temperatures are likely to occur, for example, the light-emitting elements 3 and the cooling fan 6 can have longer lives.
(effect 5) the cooling fan 6 is disposed on the side surface of the illumination device 1A, whereby the illumination device 1A can be easily assembled. The product is easily expanded by the presence of the cooling fan 6, which contributes to the standardization of the product. For example, by adding the cooling fan 6 to the lighting device which does not have the cooling fan 6 and has a luminous flux of 1 ten thousand lumens, the light source current can be increased, and the lighting device 1A having a luminous flux of 1 ten thousand 5 thousand lumens, for example, can be achieved. In this way, lighting devices having different performances can be manufactured easily and at low cost by the presence or absence of the cooling fan 6.
(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. This can provide the following effects. Since the substantial occupied space of the illumination device 1A can be reduced, the illumination device 1A can be disposed in a space-saving manner. Since the weight balance of the illumination device 1A is improved, the amplitude of the illumination device 1A at the time of an earthquake can be reduced, and the shock resistance can be further improved. 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. This can achieve the above-described effects more remarkably.
In embodiment 1, the cooling fan 6 is disposed so that the direction in which the airflow is blown out from the outlet of the cooling fan 6 is parallel to the first base 2. As a modification to this, the cooling fan 6 may be disposed such that the outlet of the cooling fan 6 is directed obliquely downward so that the direction of the airflow blown out from the outlet of the cooling fan 6 is inclined with respect to the first base 2, although not shown. This can provide the following effects. The airflow from the outlet of the cooling fan 6 can be blown to the first base 2 more efficiently. This enables heat to be more efficiently dissipated from the first base 2 having a high temperature, and therefore the temperature of the light emitting element 3 can be further reduced.
Embodiment 2.
Next, embodiment 2 will be described with reference to fig. 10, focusing on differences from embodiment 1 described above, and the description of the same or corresponding portions will be simplified or omitted. Fig. 10 is a perspective view of the illumination device 1B included in the illumination system according to embodiment 2, as viewed from obliquely above.
As shown in fig. 10, the cooling fan 6 included in the lighting device 1B according to embodiment 2 is provided at a position slightly higher than that of embodiment 1. The upper end of the cooling fan 6 is located higher than the second pedestal 5. The lower end of the cooling fan 6 is located at a height between the first and second bases 2 and 5. The cooling fan 6 is fixed to the power supply housing 7d by two screws 16. The cooling fan 6 has a portion facing the power supply housing 7d and a portion facing the first air vent 8.
A part of the airflow generated by the cooling fan 6 is blown to the surface of the power supply housing 7 d. The power supply housing 7d has a side surface facing the same direction as the first air vent 8. A part of the airflow generated by the cooling fan 6 is blown to the side surface of the power supply housing 7 d. The remaining airflow of the airflow generated by the cooling fan 6 flows into the space between the first base 2 and the second base 5 through the first ventilation port 8 and is discharged to the outside through the second ventilation port 9, as in the airflow of embodiment 1.
According to embodiment 2, the following effects can be obtained in addition to the effects similar to embodiment 1. By blowing a part of the airflow generated by the cooling fan 6 to the surface of the power supply housing 7d, heat dissipation from the surface of the power supply housing 7d can be further promoted. As a result, the temperature of the electrical components included in the power supply device 7 can be further reduced, and the efficiency of the power supply device 7 can be further improved. Further, by positioning the cooling fan 6 at a relatively high position, more cooling air flows to the upper portion of the heat dissipating fins 4, that is, the tip portions of the heat dissipating fins 4. This also achieves an effect of improving heat dissipation of the light emitting element 3.
The cooling fan 6 is not fixed to the second base 5, but is fixed to the power supply housing 7d with screws 16. The rib 5b on the side facing the cooling fan 6 of the four sides of the second base 5 is not provided. According to the present embodiment, since the cooling fan 6 does not need to be fixed to the second base 5 by the screws 16, the ribs 5b of the second base 5 can be omitted. This can reduce the weight and cost of the second base 5, and can further reduce the weight and cost of the lighting device 1B.
Description of reference numerals
The lighting device comprises a 1A and 1B lighting device, a 2 first base, a 3 light-emitting element, a 4 heat radiation fin, a 5 second base, a 6 cooling fan, a 7 power supply device, a 7a light source driving circuit, a 7B fan driving circuit, a 7c electronic circuit substrate, a 7d power supply frame body, a 7e control part, an 8 first ventilation hole, a 9 second ventilation hole, a 10 support column, an 11 first support piece, a 12 second support piece, a 13 cable, a 14 reflector, a 15 light-transmitting cover, a 17 light source part, an 18 light source temperature sensor, a 19 fan speed sensor, a 60 terminal device, a 61 operation part, a 62 display and a 100 alternating current power supply.

Claims (12)

1. A lighting system comprising a lighting device and a terminal device configured to enable a user to remotely operate the lighting device,
the lighting device is provided with:
a light source section having a light emitting element;
a heat sink that dissipates heat of the light source section;
a cooling fan that generates an air flow that cools the heat sink; and
a control member that drives the light source section and the cooling fan,
the control means causes the light source section to be turned on in a notification lighting mode instead of a normal lighting mode at least temporarily when at least one of a phenomenon related to a failure of the cooling fan, a phenomenon related to a lifetime of the cooling fan, and a phenomenon related to a lifetime of the light source section occurs,
the notification lighting pattern and the normal lighting pattern can be recognized by human vision,
the terminal device is capable of accepting an operation for releasing the notification lighting mode.
2. The lighting system of claim 1,
the terminal device is provided with a notification means for notifying the occurrence of the at least one phenomenon.
3. The lighting system of claim 1 or claim 2,
a fan speed detecting means for detecting a fan speed, which is a rotational speed of the cooling fan,
the control means detects a failure of the cooling fan as the at least one phenomenon based on the fan speed.
4. The lighting system according to any one of claim 1 to claim 3,
the control means detects the life of the cooling fan as the at least one phenomenon based on an accumulated operating time or an accumulated number of revolutions of the cooling fan.
5. The lighting system according to any one of claims 1 to 4, wherein:
a light source temperature detection means that detects a light source temperature that is a temperature correlated with a temperature of the light source section; and
a light source current detection member that detects a light source current as a current value of the light source section,
the control means detects a lifetime of the light source section as the at least one phenomenon based on the light source temperature, the light source current, and a lighting time of the light source section.
6. The lighting system according to any one of claims 1 to 5,
when the at least one phenomenon occurs, the control means turns on the light source unit in the notification lighting mode at a predetermined timing, and turns on the light source unit in the normal lighting mode at a timing other than the predetermined timing.
7. The lighting system according to any one of claims 1 to 6,
the notification lighting pattern is a pattern in which the blinking of the light source unit or the intensity of the light output is repeated.
8. The lighting system according to any one of claims 1 to 7,
the color of light irradiated from the light source section in the notification lighting mode is different from the color of light irradiated from the light source section in the normal lighting mode.
9. The lighting system according to any one of claims 1 to 8,
the control means operates the cooling fan for at least a part of a period in which the lighting device is turned off.
10. The lighting system of claim 9,
the rotational speed of the cooling fan when the cooling fan is operated in the at least one part of the period is higher than the rotational speed of the cooling fan when the lighting device is turned on.
11. The lighting system according to any one of claims 1 to 10,
the at least one phenomenon includes at least the arrival of a time period when at least one of the cooling fan and the light source unit should be replaced.
12. The lighting system according to any one of claims 1 to 11,
the at least one phenomenon includes a first specific phenomenon and a second specific phenomenon,
the control means may cause the light source section to be turned on in at least a temporary manner in a first notification lighting mode instead of the normal lighting mode when the first specific phenomenon occurs,
the control means may cause the light source section to be turned on in at least a temporary manner in a second notification lighting mode instead of the normal lighting mode when the second specific phenomenon occurs,
the first notification lighting pattern and the second notification lighting pattern can be recognized by human vision.
CN201780091486.6A 2017-07-14 2017-07-14 Lighting system Pending CN110832249A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/025792 WO2019012702A1 (en) 2017-07-14 2017-07-14 Illumination system

Publications (1)

Publication Number Publication Date
CN110832249A true CN110832249A (en) 2020-02-21

Family

ID=65001152

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201780091486.6A Pending CN110832249A (en) 2017-07-14 2017-07-14 Lighting system

Country Status (3)

Country Link
JP (1) JP6784332B2 (en)
CN (1) CN110832249A (en)
WO (1) WO2019012702A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023210695A1 (en) * 2022-04-26 2023-11-02 ダイキン工業株式会社 Air treatment device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005338213A (en) * 2004-05-25 2005-12-08 Iwasaki Electric Co Ltd Device and method for cooling high-pressure discharge lamp
JP2010103026A (en) * 2008-10-27 2010-05-06 Mitsubishi Electric Corp Luminaire
CN104006368A (en) * 2013-02-22 2014-08-27 株式会社小糸制作所 Vehicular lamp
JP2016116009A (en) * 2014-12-12 2016-06-23 三菱電機株式会社 Image display device
CN106605099A (en) * 2014-04-28 2017-04-26 比兹沃斯有限责任公司 Led venue lighting system and method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005338213A (en) * 2004-05-25 2005-12-08 Iwasaki Electric Co Ltd Device and method for cooling high-pressure discharge lamp
JP2010103026A (en) * 2008-10-27 2010-05-06 Mitsubishi Electric Corp Luminaire
CN104006368A (en) * 2013-02-22 2014-08-27 株式会社小糸制作所 Vehicular lamp
CN106605099A (en) * 2014-04-28 2017-04-26 比兹沃斯有限责任公司 Led venue lighting system and method
JP2016116009A (en) * 2014-12-12 2016-06-23 三菱電機株式会社 Image display device

Also Published As

Publication number Publication date
WO2019012702A1 (en) 2019-01-17
JPWO2019012702A1 (en) 2019-12-12
JP6784332B2 (en) 2020-11-11

Similar Documents

Publication Publication Date Title
US7837363B2 (en) LED illuminating device and light engine thereof
EP2025998B1 (en) Cooling structure for street lamp using light emitting diode
US8692444B2 (en) Solid state low bay light with integrated and sealed thermal management
US20110025211A1 (en) Light emitting diode lighting device
JP6708308B2 (en) Lighting device and connected lighting device
US20120098437A1 (en) Automatically Adjusting Task Light
US20130051017A1 (en) Led based down light
WO2017135253A1 (en) Projector
JP2013037852A (en) Lighting fixture
JP2008218075A (en) Led lighting device
CN110832249A (en) Lighting system
CN110914592B (en) Lighting device
JP5294044B2 (en) lighting equipment
JP6260644B2 (en) Lighting device
KR100581392B1 (en) Medium Intensity Avitation Obstruction Light
US9523494B2 (en) LED lighting unit
JP2010251191A (en) Projector
KR100682072B1 (en) LED lamp for beacon-obstacle illuminator
JP6801793B2 (en) Ceiling embedded lighting device
JP5888624B2 (en) lighting equipment
JP2006179443A (en) Illumination led mounting board with excellent heat radiation property and case
KR20090096319A (en) Light by Pulse Width Modulation control
JP2018056141A (en) Lighting fixture
KR20160060877A (en) Flood light and method thereof
JP2016173997A (en) Light fitting

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20200221