JP2021034322A - Lighting device - Google Patents

Abstract

To provide a lighting device that can charge a storage battery without rising the current electricity rate classification to a higher classification.SOLUTION: A lighting device 10 includes a storage battery 13, a charging/discharging part 41 that charges and discharges the storage battery 13, a brightness sensor 27 that detects peripheral brightness, a lighting circuit part 40, and a control unit 43. The lighting circuit part 40 turns on and off a light source 12 by an external power supply E or a power source of the storage battery 13 that is used in a case of power outage of the external power supply E, according to peripheral brightness detected by the brightness sensor 27. The control unit 43 controls the charging/discharging part 41, and causes the power source of the storage battery 13 to be discharged to supply the power to the lighting circuit part 40 in a case of power outage of the external power supply E, and causes the storage battery 13 to be charged when power is supplied from the external power supply E except to the lighting circuit part 40 causing the light source 12 to light with a brightness equal to or higher than a predetermined brightness by the external power supply E.SELECTED DRAWING: Figure 1

Description

An embodiment of the present invention relates to a lighting device including a storage battery.

Conventionally, for lighting devices such as security lights and street lights, the electricity rate classification of public street lights is determined by the electric power company, and lighting devices corresponding to each classification are provided.

In addition, some such lighting devices are provided with an emergency storage battery so that the light source lights up even when the external power supply fails.

When the lighting device is equipped with a storage battery, the power to turn on the light source and the power to charge the storage battery may exceed the applicable electricity rate category, and the electricity rate category may have to be raised to the upper category. ..

JP-A-2017-195203

An object of the present invention is to provide a lighting device capable of charging a storage battery without raising the electricity rate category to the above category.

The lighting device of the embodiment includes a storage battery, a charging / discharging unit for charging / discharging the storage battery, a brightness sensor for detecting the ambient brightness, a lighting circuit unit, and a control unit. The lighting circuit unit turns on and off the light source by the power supply of the external power supply or the storage battery at the time of power failure of the external power supply according to the ambient brightness detected by the brightness sensor. The control unit controls the charge / discharge unit, discharges the power supply of the storage battery and supplies it to the lighting circuit unit when the external power supply fails, and when the external power supply supplies power, the lighting circuit unit uses the external power supply to make the light source brighter than the specified brightness. Charge the storage battery when it is not lit.

According to the lighting device of the embodiment, it can be expected that the storage battery can be charged without raising the electricity charge category to the above category.

It is a block diagram of the lighting apparatus which shows one Embodiment. It is sectional drawing of the lighting apparatus of the same as above.

Hereinafter, one embodiment will be described with reference to the drawings.

FIG. 2 shows a cross-sectional view of the lighting device 10. The lighting device 10 is an outdoor lighting device installed outdoors, such as a security light or a street light.

The lighting device 10 includes a housing 11, a light source 12, a storage battery 13, and a power supply unit 14 arranged in the housing 11, and a translucent cover 15 attached to the lower surface side of the housing 11.

The housing 11 is long from the base end side to the opposite front end side, and is formed in a shape in which the lower surface side is open. On the base end side of the housing 11, for example, a mounting portion 18 to be attached to a utility pole, a pole, or the like is integrally projected, and a wiring hole 19 for drawing in an external power source is provided. A daylighting hole 20 for collecting outside light is provided on the upper surface side of the housing 11.

Further, as the light source 12, for example, a plurality of light emitting elements (semiconductor light emitting elements) such as LEDs and organic ELs are used.

Further, as the storage battery 13, a rechargeable secondary battery such as a lithium ion battery is used. The storage battery 13 is housed and arranged in the space inside the housing 11. The storage battery 13 may be arranged in another place outside the housing 11.

Further, the power supply unit 14 includes a board 23 and a plurality of electric components 24 constituting the power supply circuit mounted on the board 23. A plurality of light sources 12 are also mounted on the substrate 23. In addition to the substrate 23, a light source substrate on which a plurality of light sources 12 are mounted may be used. An electric wire 25 for supplying an external power source is connected to the power supply unit 14. The electric wire 25 is inserted inside and outside the housing 11 via a bush 26 mounted in the wiring hole 19.

The electric component 24 includes a brightness sensor (illuminance sensor) 27 that receives external light through the lighting hole 20 of the housing 11 and detects the ambient brightness (illuminance) of the lighting device 10. In this brightness sensor 27, a daylighting unit 28 is used to guide outside light from the daylighting hole 20 of the housing 11. The daylighting unit 28 guides the daylighting window 30 having translucency, which is fitted into the daylighting hole 20 via the packing 29, and the outside light collected from the daylighting window 30 to the brightness sensor 27, and the outside light is inside the housing 11. It is provided with a light-shielding cylinder 31 that prevents the light from being released into.

Further, the translucent cover 15 has translucency and is attached so as to cover the lower surface side of the housing 11. The translucent cover 15 is formed with a plurality of lens portions 34 that control the light distribution corresponding to the positions of the light sources 12.

Then, the lighting device 10 is installed on, for example, a utility pole or a pole installed on the side of a road by means of a mounting portion 18 and a mounting bracket used separately. At that time, the power supply unit 14 is connected to the external power supply by the electric wire 25, and the housing 11 is grounded. In the installed state of the lighting device 10, the tip end side of the housing 11 is inclined obliquely upward, and the light source 12, the translucent cover 15, and the like are opposed to the center side of the road.

Next, FIG. 1 shows a block diagram of the lighting device 10.

The lighting device 10 includes a light source 12, a storage battery 13, and a power supply unit 14. An external power source E such as a commercial power source (commercial AC power source), a light source 12, and a storage battery 13 are connected to the power supply unit 14.

The power supply unit 14 includes a lighting circuit unit (lighting unit) 40 that lights the light source 12 by the external power source E or by the power supply of the storage battery 13 in the event of a power failure of the external power source E, and a charging / discharging unit (charging / discharging unit) that charges / discharges the storage battery 13. 41, a brightness sensor 27 that detects the brightness of the surroundings, a control unit 43 that controls the lighting circuit unit 40 and the charging / discharging unit 41 according to the detection of the brightness sensor 27, and the like are provided.

The lighting circuit unit 40 converts the external power source E into a predetermined lighting power source and supplies the light source 12 to the light source 12 when the external power source E is supplied, and also causes the light source 12 to light up. The power supply of 13 is converted into a predetermined power supply for lighting and supplied to the light source 12, and the light source 12 is turned on.

The control unit 43 has a function of a timekeeping unit 45 that measures the time.

The control unit 43 has a function of controlling the lighting circuit unit 40 according to the ambient brightness detected by the brightness sensor 27 to turn on / off the light source 12.

Further, the control unit 43 controls the charge / discharge unit 41, and when the external power supply E has a power failure, the power supply of the storage battery 13 is discharged and supplied to the power supply unit 14 including the lighting circuit unit 40 and the like, while the external power supply E of the external power supply E. At the time of power supply, the lighting circuit unit 40 has a function of charging the storage battery 13 except when the light source 12 is lit by the external power source E to have a predetermined brightness or higher.

Further, the control unit 43 has a function of changing the charging rate for charging the storage battery 13 according to the charging status of the storage battery 13 and the change in the ambient brightness detected by the brightness sensor 27. The charge status of the storage battery 13 is, for example, the charge amount of the storage battery 13, and the charge amount of the storage battery 13 is detected by the charge amount detection function of the control unit 43.

Further, the control unit 43 has a function of controlling the lighting circuit unit 40 so that the light source 12 is dimmed and lit by an external power source E at a predetermined brightness or less when the storage battery 13 is charged when the light source 12 is lit. There is.

Further, the control unit 43 has a function of continuing charging for a predetermined time or longer after the power supply of the storage battery 13 is discharged.

Further, the control unit 43 has a function of charging the storage battery 13 when a predetermined time has elapsed from the previous charging of the storage battery 13.

These predetermined times are determined based on the time measured by the time measuring unit 45.

Then, the lighting device 10 configured in this way operates by the external power source E when the external power source E is supplied.

In the evening, when the surroundings of the lighting device 10 become dark and the brightness value detected by the brightness sensor 27 falls below a predetermined lighting determination threshold value, the lighting circuit unit 40 is operated by the external power supply E to turn on the light source 12. Turn it on.

On the other hand, when the surroundings of the lighting device 10 become bright at dawn and the brightness value detected by the brightness sensor 27 exceeds a predetermined extinguishing determination threshold value, the operation of the lighting circuit unit 40 is stopped and the light source 12 is turned on. Turn off the lights.

Further, when a predetermined time has passed since the previous charge of the storage battery 13, or when it is determined that the charge amount of the storage battery 13 has decreased to a predetermined value or less by the charge amount detection function of the control unit 43, for example, the storage battery 13 To charge. The storage battery 13 is charged except when the light source 12 is lit by the external power source E to have a predetermined brightness or higher. That is, when the light source 12 is lit by the external power source E to have a brightness equal to or higher than a predetermined brightness, the storage battery 13 is not charged. For example, the storage battery 13 is charged during the daytime when the surroundings are bright and the light source 12 is not turned on, and the storage battery 13 is not charged during the nighttime when the surroundings are dark and the light source 12 is turned on above a predetermined brightness. It should be noted that when the light source 12 is lit at a predetermined brightness or higher, when the light source 12 is lit at full light, when the light source 12 is lit at a dimming intensity close to full light, etc. included.

By the way, for lighting devices such as security lights and street lights, the electricity rate classification of public street lights is determined by the electric power company, and the lighting devices corresponding to each classification are provided. When a lighting device corresponding to a certain electricity rate category is equipped with a storage battery, the power to charge the storage battery is added to the power to turn on the light source, so that the lighting device exceeds the corresponding electricity rate category, and the electricity rate category is changed. It may be necessary to raise it to the upper category.

As described above, the storage battery 13 is charged only when the light source 12 is lit by the external power source E to have a brightness equal to or higher than a predetermined brightness, so that the electricity charge category is not raised to the above category. The storage battery 13 is charged.

Further, when charging the storage battery 13, the charging rate for charging the storage battery 13 may be changed according to the charging status of the storage battery 13 and the change in the ambient brightness detected by the brightness sensor 27. For example, the life of the storage battery 13 can be extended by lowering the charging rate and charging the storage battery 13 with a relatively small load (compared to quick charging). Alternatively, if the brightness value detected by the brightness sensor 27 is on a downward trend but the storage battery 13 is not completely charged or the amount of charge of the storage battery 13 is low, the charging rate is increased. By quick charging, the charging of the storage battery 13 is completed or the charge amount of the storage battery 13 is completed before the period in which the light source 12 is turned on by the external power source E to a predetermined brightness or higher, that is, before the period in which charging is prohibited. Can be secured.

Further, in the case of a power failure of the external power source E, the power source of the storage battery 13 is discharged from the lighting device 10, and the lighting device 10 is operated by the power source of the storage battery 13.

Also in this case, when the surroundings of the lighting device 10 become dark in the evening and the brightness value detected by the brightness sensor 27 falls below a predetermined lighting determination threshold value, the lighting circuit unit 40 is turned on by the power supply of the storage battery 13. It operates and turns on the light source 12.

On the other hand, when the surroundings of the lighting device 10 become bright at dawn and the brightness value detected by the brightness sensor 27 exceeds a predetermined extinguishing determination threshold value, the operation of the lighting circuit unit 40 is stopped and the light source 12 is turned on. Turn off the lights.

Further, when the power failure is resolved and the power supply of the external power source E is resumed, the lighting device 10 operates by the external power source E as described above and charges the storage battery 13.

After the power supply of the storage battery 13 is discharged, the storage battery 13 is continuously charged for a predetermined time or longer to compensate for the insufficient charge.

If the brightness value detected by the brightness sensor 27 falls below the predetermined lighting determination threshold value before the charging of the storage battery 13 elapses for a predetermined time or more, or before the charging of the storage battery 13 is completed, or the like. Charging of the storage battery 13 and lighting of the light source 12 may be performed in parallel.

In this case, the lighting circuit unit 40 operated by the external power source E dimmes and lights the light source 12 at a predetermined brightness or less. The dimming lighting of the light source 12 at a predetermined brightness or less is within a range in which the lighting device 10 does not exceed the corresponding electricity charge category even if the power for lighting the light source 12 is added to the power for charging the storage battery 13. At this time, the electric power when charging the storage battery 13 is smaller than the electric power when the light source 12 is lit.

Along with the dimming lighting of the light source 12, the charging rate for charging the storage battery 13 may be changed so as to be lowered. As a result, the charging of the storage battery 13 and the lighting of the light source 12 are performed in parallel without raising the electricity rate classification to the upper classification.

Further, the light source 12 may be dimmed and lit according to the value of the brightness detected by the brightness sensor 27. In this case, the storage battery 13 may be charged or the charging may be stopped according to the dimming degree of the light source 12.

Then, according to the lighting device 10 configured in this way, the storage battery 13 is charged by performing the charging at a time other than when the light source 12 is lit to a predetermined brightness or higher by the external power source E, so that the electricity charge is charged. The storage battery 13 can be charged without raising the category to the above category.

Further, by changing the charging rate for charging the storage battery 13 according to the charging status of the storage battery 13 and the change in the ambient brightness detected by the brightness sensor 27, the storage battery 13 can be charged so as to extend the life of the storage battery 13. Alternatively, the charging of the storage battery 13 can be completed or the charge amount of the storage battery 13 can be secured before the period in which the light source 12 is turned on by the external power source E to have a predetermined brightness or higher.

Further, when the storage battery 13 is charged when the light source 12 is lit, the light source 12 is dimmed and lit by the external power source E at a predetermined brightness or less. The lighting of the light source 12 can be performed in parallel.

Further, after the power supply of the storage battery 13 is discharged, the insufficient charge can be compensated by continuing the charging of the storage battery 13 for a predetermined time or longer.

Further, when a predetermined time has elapsed from the previous charge of the storage battery 13, the self-discharged charge amount of the storage battery 13 can be supplemented by charging the storage battery 13.

In addition to security lights and street lights, the lighting device can also be applied to other lighting devices such as garden lights that are installed outdoors and turn on and off the light source according to the brightness of the surroundings.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

10 Lighting equipment
12 light source
13 Storage battery
27 Brightness sensor
40 Lighting circuit
41 Charge / discharge section
43 Control unit E External power supply

Claims (3)

With a storage battery;
With a charge / discharge unit that charges / discharges the storage battery;
With a brightness sensor that detects the brightness of the surroundings;
A lighting circuit unit that turns on and off the light source by the external power source or the power source of the storage battery at the time of power failure of the external power source according to the ambient brightness detected by the brightness sensor;
The charging / discharging unit is controlled, and when the external power supply fails, the power supply of the storage battery is discharged and supplied to the lighting circuit unit, and when the external power supply is supplied, the lighting circuit unit uses the external power supply to determine the light source. With a control unit that charges the storage battery when it is not lit above the brightness.
A lighting device characterized by comprising. The control unit is characterized in that, when charging the storage battery when the light source is lit, the lighting circuit unit controls the light source to be dimmed and lit with a predetermined brightness or less by the external power source. 1. The lighting device according to 1. The first or second aspect of the present invention, wherein the control unit changes the charging rate for charging the storage battery according to the charging status of the storage battery and the change in the ambient brightness detected by the brightness sensor. Lighting device.

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