JP2013045655A - Lighting device having photovoltaic power generation function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device having photovoltaic power generation function of which the structure can be simplified.SOLUTION: The lighting device having photovoltaic power generation function 10 includes a solar cell 12, a power storage battery 13 for storing power generated by the solar cell 12, a lighting part 15 which is turned on by the power of the power storage battery 13, and a controlling part 14 which monitors the generated power voltage of the solar cell 12 and deterioration of an average value of supplied power from the power storage battery 13 to the lighting part 15 and controls the lighting part 15. When the generated power voltage of a reference voltage or lower continues for a prescribed time duration, the controlling part 14 conducts an information control to inform it to the outside.

Description

  The present invention relates to a lighting device with a solar power generation function that is equipped with a solar cell that takes in sunlight and generates electric power and is applied to street lamps, ceiling lights, and the like.

2. Description of the Related Art Conventionally, there is known a lighting device with a solar power generation function including a power generation unit that generates power using natural energy and a storage battery that stores electric power generated by the power generation unit (see, for example, Patent Document 1).
Patent Document 1 discloses a charge amount adjusting unit that adjusts a charge amount of power generated by a power generation unit to a storage battery, an external load that operates with power supplied from the storage battery, and power supply from the storage battery to the external load. An independent power supply device having a switch for conducting / interrupting is provided.
Patent Document 1 controls the charge amount adjusting means and the switch together with the abnormality determination means for determining the abnormal state of the independent power supply apparatus by measuring the state of the independent power supply apparatus with a sensor, and the determination result of the abnormality determination means. And an abnormality control means for stopping charging and discharging of the storage battery.

JP 2006-25480 A (FIG. 1, claim 1)

In Patent Document 1, when the measured value of the illuminance sensor is equal to or greater than a predetermined value, but the output of the solar cell voltage sensor is equal to or less than the predetermined value, the presence / absence of abnormality as a solar cell abnormality is indicated on the display means. Solar cell abnormality monitoring means for displaying is provided.
Normally, if a solar cell is damaged or disconnected, and there is snow on the surface of the solar cell, the generated power of the solar cell will drop and it will not be possible to charge the storage battery, and such a state should continue for several days or more. Is common.
However, Patent Document 1 requires a dedicated device called an illuminance sensor.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a lighting device with a solar power generation function that does not require an illuminance sensor and has a simple structure.

  An illumination device with a photovoltaic power generation function according to the present invention includes a solar battery, a storage battery that stores electric power generated by the solar battery, an illumination unit that is lit by the electric power of the storage battery, a power generation voltage of the solar battery, and the storage battery. And a control unit that controls the illumination unit and monitors the decrease in the average value of the power supplied to the illumination unit, and the control is performed when the generated voltage continues below a reference voltage for a certain period of time. The notification control that the unit notifies to the outside is performed.

  In the lighting device with a photovoltaic power generation function according to the present invention, after the lapse of 24 hours from when the storage battery has been stored in the storage battery to such an extent that the storage battery can supply the lighting unit with supply power that allows the illumination unit to emit light with maximum illuminance The control unit performs the notification control.

  In the illumination device with a photovoltaic power generation function according to the present invention, the control unit causes the illumination unit to be turned on by notification different from normal lighting.

  The illumination device with a photovoltaic power generation function according to the present invention includes a display device, and the control unit performs the notification control using the display device.

  According to the lighting device with a photovoltaic power generation function according to the present invention, an illuminance sensor is not required, and the structure can be simplified.

The side view of the illuminating device with a solar power generation function of 1st Embodiment which concerns on this invention. The circuit block diagram of the illuminating device with a solar power generation function of 1st Embodiment which concerns on this invention. The timing chart at the time of fine weather when the solar cell of the illuminating device with a photovoltaic power generation function of the first embodiment according to the present invention is normal The timing chart at the time of rain when the solar cell of the illuminating device with the photovoltaic power generation function according to the first embodiment of the present invention is normal The timing chart at the time of the malfunction of the solar cell of the illuminating device with a solar power generation function of 1st Embodiment which concerns on this invention Timing chart at the time of malfunction of solar cell of lighting apparatus with photovoltaic power generation function according to second embodiment of the present invention The circuit block diagram of the illuminating device with a solar power generation function of 3rd Embodiment which concerns on this invention. The circuit block diagram of the illuminating device with a solar power generation function of 4th Embodiment which concerns on this invention.

Hereinafter, a plurality of embodiments of the illumination device with a photovoltaic power generation function according to the present invention will be described with reference to the drawings.
(First embodiment)
As shown in FIG. 1, a lighting device 10 with a photovoltaic power generation function according to a first embodiment of the present invention includes a pole 11 embedded in the ground 90, and a solar cell panel 12 attached to the upper end of the pole 11. And a storage battery 13 and a control unit 14 attached to the lower part of the pole 11.
The lighting device with a solar power generation function 10 includes an illumination unit 15 attached to the upper part of the pole 11.

The solar cell panel 12 takes in sunlight and generates electric power. The storage battery 13 stores the electric power generated by the solar battery panel 12. The illumination unit 15 is lit by the electric power stored in the storage battery 13. The illumination unit 15 has a light distribution characteristic directed downward.
The control unit 14 monitors the power generation voltage of the solar battery panel 12 and the decrease in the average value of the supplied power supplied from the storage battery 13 to the lighting unit 15 and controls the lighting unit 15.

As shown in FIG. 2, the illumination unit 15 includes a lighting device 16 and a light source 17. An LED or a light bulb is applied to the light source 17. When the light source 17 is an LED, the lighting device 16 is a power supply unit. When the light source 17 is a light bulb, the lighting device 16 serves as a power conditioner.
The control unit 14 includes an arithmetic processing circuit (microcomputer) 18, and a solar cell power generation voltage measurement value is given to the arithmetic processing circuit 18 from a solar cell power generation voltage detection unit 19 electrically connected to the solar cell panel 12.
The control unit 14 is set in advance as a timer for 24 hours, and the illumination control time setting unit 20 sets the time from turning on after sunset until turning off after sunrise.
The arithmetic processing circuit 18 is given a determination time value from the illumination control time setting unit 20.

The control unit 14 includes a backflow prevention unit 21 that is a diode having an anode connected to the solar cell panel 12, and includes a charge control unit 22 to which the cathode of the backflow prevention unit 21 is connected.
The charging control unit 22 is a relay or the like, and is turned on by a charge permission signal given from the arithmetic processing circuit 18 until the storage capacity value of the storage battery 13 detected by the arithmetic processing circuit 18 reaches a predetermined value, thereby the solar battery DC power generated by the panel 12 is supplied to the storage battery 13.
In contrast to this, when the storage capacity value of the storage battery 13 detected by the arithmetic processing circuit 18 exceeds a predetermined value, the charging control unit 22 is turned off by a charge prohibition signal given from the arithmetic processing circuit 18, thereby The energization path to 13 is cut off.

The control unit 14 includes an illumination lighting control unit 23 and a storage battery voltage detection unit 24. The illumination lighting control unit 23 is a relay or the like, and is turned on by the illumination permission signal given from the arithmetic processing circuit 18 and supplies the power stored in the storage battery 13 to the lighting device 16.
Unlike this, the illumination lighting control unit 23 is turned off by the illumination prohibition signal given from the arithmetic processing circuit 18 and interrupts the energization path from the storage battery 13 to the lighting device 16.
The storage battery voltage detection unit 24 constantly detects the electric power stored in the storage battery 13, and controls the storage battery 13 not to be overcharged or overdischarged by giving the detected power value signal to the arithmetic processing circuit 18. .

In the control unit 14, the arithmetic processing circuit 18 constantly monitors the power generation voltage value of the solar cell panel 12 based on the solar cell power generation voltage measurement value supplied from the solar cell power generation voltage detection unit 19. The lighting device 16 is controlled based on the measured value.
Specifically, the control unit 14 stores a power generation voltage threshold V1 for detecting sunset and a power generation voltage threshold V2 for detecting sunrise (see FIG. 3).

The control unit 14 detects the time when the power generation voltage of the solar battery panel 12 is lower than the power generation voltage threshold V1 by the arithmetic processing circuit 18 as sunset, turns on the lighting lighting control unit 23, and turns on the light source 17 of the lighting unit 15. Lights up.
The control unit 14 turns off the illumination lighting control unit 23 and extinguishes the light source 17 of the illumination unit 15 when the arithmetic processing circuit 18 detects sunset or when a certain time has elapsed after detecting sunset.

When the arithmetic processing circuit 18 detects that the power generation voltage of the solar battery panel 12 is lower than the power generation voltage threshold V2 and the power generation voltage threshold V1, the control unit 14 starts time measurement using a clock timer or the like.
And the arithmetic processing circuit 18 continues time measurement until the power generation voltage of the solar cell panel 12 exceeds the power generation voltage threshold value V2.
That is, the arithmetic processing circuit 18 starts measuring time when the storage battery 13 has stored the supply power that allows the illumination unit 15 to emit light at the maximum illuminance to the extent that the storage battery 13 can supply the illumination unit 15.
The arithmetic processing circuit 18 switches the light source 17 of the illumination unit 15 to normal lighting when the measured time measurement value exceeds the 24-hour determination time value given from the illumination control time setting unit 20. The notification control to notify to the outside is executed by turning on the notification with different intermittent lighting.

Next, the control operation of the lighting device with a solar power generation function 10 will be described.
As shown in FIG. 3, when the solar panel 12 is normal and sunny, and there is sunrise at time T <b> 10, the control unit 14 causes the arithmetic processing circuit 18 to change the generated voltage of the solar panel 12 to the generated voltage threshold value. Since it is detected that the voltage exceeds V2, the light source 17 of the illumination unit 15 is turned off.
When there is sunset at time T11, the control unit 14 detects that the power generation voltage of the solar battery panel 12 has fallen below the power generation voltage threshold V1 by the arithmetic processing circuit 18, and thus the light source 17 of the illumination unit 15 is turned off. Light up.

At this time, the control unit 14 measures the time until the arithmetic processing circuit 18 starts time measurement at time T11, and there is sunrise at time T12, and the power generation voltage of the solar battery panel 12 exceeds the power generation voltage threshold V2. Will continue.
The time measurement value of the arithmetic processing circuit 18 at the time T12 does not exceed the determination time value of 24 hours corresponding to the time T14 from the time T12 given from the lighting control time setting unit 20 to the time T14 after the time T13. The control unit 14 does not perform notification control.

As shown in FIG. 4, even when the solar panel 12 is in a rainy state or the like when the solar panel 12 is normal, even if the sunlight is low or the surface of the solar panel 12 is shaded, A generated voltage exceeding the generated voltage threshold V2 is generated from the solar cell panel 12 once a day.
It is detected that there is sunrise at time T15 on a clear day, sunset occurs at time T16, and the power generation voltage of the solar cell panel 12 falls below the power generation voltage threshold V1.

In the control unit 14, the arithmetic processing circuit 18 starts time measurement at time T16, and the power generation voltage of the solar cell panel 12 exceeds the power generation voltage threshold V2 at time T18 after time T17 when it becomes rainy day. Time measurement continues until.
At time T18, the control unit 14 does not perform notification control because the time measurement value of the arithmetic processing circuit 18 does not exceed the determination time value of 24 hours.

As shown in FIG. 5, the control unit 14 detects that there is sunrise at time T21, sunset at time T22, and that the power generation voltage of the solar cell panel 12 has fallen below the power generation voltage threshold V1. The arithmetic processing circuit 18 starts time measurement at time T22.
At this time, when the solar cell panel 12 is damaged, disconnected, or has accumulated snow on the surface of the solar cell panel 12, and the solar cell panel 12 cannot generate power, the solar cell panel 12 Only the generated voltage below V2 and the generated voltage threshold V1 is generated.

Therefore, at the time T25 after the sunset at the time T23 and at the time T25 after the sunset at the time T24, the time measurement value of the arithmetic processing circuit 18 is given by the lighting control time setting unit 20 for 24 hours. The judgment time value is exceeded.
That is, the time during which the power generation voltage of the solar battery panel 12 does not exceed the power generation voltage threshold V1 exceeds the determination time value of 24 hours.
Thereby, the control part 14 performs alerting | reporting control which alert | reports outside from the time T25 by making the light source 17 of the illumination part 15 alert | report light by intermittent lighting different from normal lighting.
Note that the arithmetic processing circuit 18 can also set a determination voltage different from the power generation voltage threshold value V2, and can detect that a problem has occurred as long as it continues for an assumed night time. .

As described above, according to the illuminating device 10 with the solar power generation function according to the first embodiment of the present invention described above, when the state where the power generation voltage of the solar battery panel 12 is lower than the power generation voltage threshold V1 continues for a certain time or longer, The notification control which the part 14 alert | reports outside is performed.
Therefore, according to the illuminating device 10 with a solar power generation function, an illuminance sensor is not necessary, and the structure can be simplified as compared with the conventional case.

  According to the solar power generation function illuminating device 10, it is possible to detect the case where the decrease in the power generation voltage of the solar battery panel 12 has continued for more than 24 hours, thereby promoting early inspection and repair and improving availability.

  According to the illuminating device 10 with a solar power generation function, when the decrease in the power generation voltage of the solar battery panel 12 continues for more than 24 hours, the illumination unit 15 is informed by intermittent lighting different from normal lighting. It is possible to easily notify the outside without adding a new device.

(Second Embodiment)
Next, a lighting device with a photovoltaic power generation function according to a second embodiment of the present invention will be described.
In the following embodiments, components that are the same as those in the first embodiment described above or components that are functionally similar are denoted by the same or corresponding reference numerals in the drawings, and the description thereof is simplified or omitted. To do.

As shown in FIG. 6, in the illumination device 30 with the photovoltaic power generation function according to the second embodiment of the present invention, the notification control to the outside by the control unit 14 is different from the light source 17 of the illumination unit 15. This is a control that continuously adjusts the light.
The arithmetic processing circuit 18 detects that the time measurement value measured from time T22 to time T25 exceeds the determination time value of 24 hours at time T25.
Therefore, the control unit 14 performs notification control for notification to the outside by causing the light source 17 of the illuminating unit 15 to be notified and turned on by continuous light control different from normal lighting to the extent that the light source 17 is not turned off.

  According to the solar power generation function illuminating device 30 of the second embodiment, when a failure occurs in the solar battery panel 12, the notification lighting by continuous dimming different from the normal lighting is performed to the extent that the solar panel 12 is not turned off. Can be notified.

(Third embodiment)
Next, a lighting device with a photovoltaic power generation function according to a third embodiment of the present invention will be described.
As illustrated in FIG. 7, the lighting device with a photovoltaic power generation function 40 according to the third embodiment of the present invention includes a display device 41 that is a liquid crystal panel, an LED panel, or the like.
When the state where the power generation voltage of the solar battery panel 12 is lower than the power generation voltage threshold V1 continues for more than 24 hours, the display device 41 is externally notified as character information or image information by an electric signal supplied from the arithmetic processing circuit 18. I do.

  According to the solar power generation function illuminating device 40 of the third embodiment, the display device 41 can clearly display the malfunction of the solar battery panel 12.

(Fourth embodiment)
Next, a lighting device with a photovoltaic power generation function according to a fourth embodiment of the present invention will be described.
As shown in FIG. 8, the illumination device 50 with a photovoltaic power generation function according to the fourth embodiment of the present invention includes a transmitter 51 that transmits a failure signal given from the arithmetic processing circuit 18.
The illuminating device 50 with the photovoltaic power generation function transmits a radio signal indicating that a problem has occurred in the solar cell panel 12 from the transmitter 51 to an external receiver (not shown) through the antenna 52.
The signal transmission between the transmitter 51 and the receiver may be wired instead of wireless.

  According to the solar power generation function-equipped lighting device 50 of the fourth embodiment, by installing a receiver in a management building or the like that manages the plurality of solar power generation function-equipped lighting devices 50, a plurality of solar battery panel 12 malfunctions. Can be managed collectively.

  In the lighting device with a photovoltaic power generation function of the present invention, the pole, the solar battery panel, the storage battery, the lighting unit, and the like are not limited to the above-described embodiments, and appropriate modifications and improvements can be made.

10, 30, 40, 50 Lighting device with solar power generation function 12 Solar cell panel (solar cell)
13 Storage Battery 14 Control Unit 15 Illumination Unit 41 Display Device

Claims (4)

Solar cells,
A storage battery for storing electric power generated by the solar battery;
An illumination unit that is lit by the power of the storage battery;
A monitoring unit for monitoring the power generation voltage of the solar cell and the average value of the power supplied from the storage battery to the lighting unit, and a control unit for controlling the lighting unit,
An illumination device with a solar power generation function that performs notification control in which the control unit notifies the outside when the generated voltage continues below a reference voltage for a certain time. The lighting device with solar power generation function according to claim 1,
With solar power generation function with which the control unit performs the notification control after 24 hours from the time when the storage battery is stored in the storage battery to such an extent that the storage battery can supply the illumination unit with the supply power that the illumination unit can emit light with the maximum illuminance Lighting device. It is a lighting device with a solar power generation function according to claim 2,
The lighting device with a solar power generation function, wherein the control unit causes the illumination unit to be turned on by notification different from normal lighting. The lighting device with photovoltaic power generation function according to claim 1 or 2,
Having a display device;
The solar power generation function illuminating device in which the control unit performs the notification control by the display device.

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