JP2001210113A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized lighting fixture to be installed at lest cost but no spoiling the surrounding appearance, which can be used as emergency lighting in case of a power outage and normally produces sufficiently effective illumination in and around where it is installed. SOLUTION: The device for illumination comprises a solar cell 1, a storage battery 3 charged by the cell 1, a solar cell lamp 6 which turns on when powered by the battery 3, and a commercial power lamp 11 which turns on when powered by a commercial power supply 10. When both lamps 6 and 11 are turned on, the illuminance is obtained as much as normally required, but when only the solar cell lamp 6 is turned on, the illuminance is less is than normally required.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device provided with a solar cell.

[0002]

2. Description of the Related Art Lighting devices equipped with solar cells have been put to practical use as nighttime lighting for parks and public facilities. FIG. 3 is a connection diagram of such a conventional lighting device. (51) is a solar cell, (53) is a storage battery, and (55) is a lamp that lights up at night. (52) is a charge / discharge control device, and (54) is an inverter.

[0003] In the daytime, such a lighting device generates power by a solar cell (51) that receives sunlight, and stores the electric power in a storage battery (53).

At night, the switch (7) is closed by a sensor or timer (5) for detecting the surrounding brightness, and the circuit of the storage battery (53) and the lamp (55) is connected. Since the storage battery (53) has a DC output, it is converted from DC to AC by the inverter (54) and supplied to the lamp (55), and the lamp (55)
Lights up. In the morning, the switch (7) is opened by the sensor and the timer (5), and the lamp (55) is turned off.

[0005] The lighting device provided with the solar cell (51) can generate electric power by the solar cell (51) by itself and turn on the lamp (55) without power supply from a commercial power supply. There is an idea to use it as an emergency lighting device in the event of a power outage by using the features. For example, even when a power failure occurs due to an earthquake or the like, it can be used as lighting for displaying an evacuation site such as a park or an emergency facility such as a hospital.

However, since it is used not only in an emergency but also in normal times, a certain level of brightness is required as illumination in normal times. For example, it is often required to turn on a lamp of about 80 W to 120 W in normal times as lighting for a park that often serves as an evacuation site.

When the power consumption of the lamp 55 increases, it is necessary to supply a correspondingly large amount of power to the lamp 55. However, the power supply is a storage battery (53),
Since the storage battery (53) is charged by power generation by the solar battery (51), a large and large-capacity storage battery (53) must be used to light a bright lamp (55) that consumes a large amount of power. It is necessary to increase the amount of power generated by the battery (51).

Since the power generation efficiency of the solar cell (51) is not good,
In order to secure a large amount of power generation, the panel of the solar cell (51) must be made large in area. However, since the solar cell (51) is expensive, the equipment cost is very high.

If the daytime weather is bad, the amount of power generated by the solar battery (51) is reduced because the amount of sunlight falling on the solar battery (51) is weakened, and the storage battery cannot be charged sufficiently. Therefore, lighting cannot be performed after a bad weather day, or the lighting time becomes extremely short. Therefore, solar cells (5
Both 1) and the storage battery (53) need to be designed with a margin, so solar cells (51) with large power generation and storage batteries (53) with large capacity
It is desirable to adopt. For example, when one lamp of 55V of 100V and 90W is turned on, a solar cell (51) of 600W and a storage battery (53) of 400Ah are required.

Further, since the large solar cell (51) is heavy and easily affected by wind, the supporting device for supporting the large solar cell must be large and tough in consideration of strong winds such as typhoons.
The cost must be large.

A large solar cell (51), a large storage battery storage box, and a thick and sturdy supporting device are not good in appearance, and cause a bad appearance in a park or the like.

Further, as described above, the solar cell (51) and the storage battery (53) may be designed to have a margin in consideration of bad weather.
If the bad weather day continues for many days, it cannot be dealt with sufficiently. Therefore, if an emergency such as an earthquake or typhoon occurs after a bad weather day continues,
(55) may not be lit and may not be useful as emergency lighting.

[0013]

Therefore, the present invention can be lit as emergency lighting even in the event of a power outage, can illuminate the surroundings of the installation location with sufficient brightness in normal times, has a small equipment cost, and is small in size. It is an object to provide a lighting device which does not impair the appearance.

It is still another object of the present invention to provide a lighting device which can be used without any trouble even if a power failure occurs after a bad weather day.

[0015]

According to a first aspect of the present invention, there is provided a lighting device comprising: a solar battery; a storage battery charged by the solar battery; and a storage battery. Solar cell lamp (6), which is turned on by power supply, and solar cell lamp (6)
Separately, a commercial power supply lamp (11) that is lit by being supplied with electric power from the commercial power supply (10) is provided, and the power supply lamp (6) and the commercial power supply lamp (11) are normally lit while both are lit. The illuminance is not less than the required illuminance, and the lighting of the solar cell lamp (6) alone is less than the illuminance required in normal times.

According to this, it is only necessary to secure the required brightness by using the lamp for a solar cell (6) and the lamp for a commercial power supply (11) together. There is no need to increase it.

Therefore, the size of the solar cell (1), the storage battery (3), and the supporting device can be reduced, the equipment cost can be significantly reduced, and the scenery of a park or the like is not spoiled.

Further, even during a power failure, the solar battery lamp (6) is turned on, so that it can be used as an emergency lighting device.

According to a second aspect of the present invention, in the lighting device of the first aspect, a voltage detecting device (26) for detecting a voltage of the storage battery (23) at a predetermined time and a voltage detecting device (26). A charging device (27) capable of charging the storage battery (23) with a commercial power supply (10) when the storage battery voltage is detected to be equal to or lower than a predetermined value is provided.

According to this, the solar cell (21)
If the power generation amount of the battery is small and the storage battery (23) is not sufficiently charged, it can be detected and additional charging can be performed using the commercial power supply (10). Therefore, the solar cell lamp (6) can be turned on without any trouble even after a bad weather day.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to preferred embodiments.

Embodiment 1 FIG. 1 is a connection diagram of the present embodiment. In the figure, (1) is a 210 W solar cell, which is mounted on a supporting device such as a pole at a position where sunlight is easily received.

(3) is a 150Ah / 12V storage battery, (2) is a charge / discharge control device for controlling charging / discharging of the storage battery (3) to prevent overcharge, etc., and (10) is a 100V commercial power supply. It is.

(5) is a timer which is operated by power supply from the storage battery (3) or a dedicated battery. The reason why the power supply of the timer (5) is not the commercial power supply (10) is that the timer (5) stops at the time of a power failure, and it becomes impossible to control turning on and off of the lamp.

(6) and (11) are 40 W / 100 V lamps. In the present invention, the lamp (6) connected to the storage battery charged by the solar cell is used as a solar cell lamp and a commercial power supply (10). The connected lamp (11) is called a commercial power supply lamp, but the same lamp can be used.

In the present embodiment, one lamp of 40 W is used as the commercial power supply lamp (11). However, when brighter illuminance is required, the commercial power supply lamp (as shown by the broken line in the figure) is used. (11) may be replaced by a plurality of two or more lamps.

(4) is a 125W inverter, which is provided between the storage battery (3) and the solar battery lamp (6).
(7) and (12) are switches that are opened and closed by a timer (5), and are connected between the inverter (4) and the solar cell lamp (6) and between the commercial power supply (10) and the commercial power supply lamp (11). It is provided between them. Reference numeral (8) denotes a rectifying element for preventing backflow, which is provided between the solar cell (1) and the charge / discharge control device (2).

The solar cell (1) is smaller and lighter than the conventional one, and the supporting device for supporting the solar cell (1) can be small, so that it does not easily affect the landscape.

The storage battery (3), the inverter (4) and the like are stored in a storage box. However, since the storage battery (3) is small, a storage box that is small and inconspicuous can be used. The storage box can be buried underground if maintenance is possible,
Further, it may be used as a park bench.

In the daytime, a solar cell (1) that receives sunlight generates electric power and stores it in a storage battery (3) via a charge / discharge control device (2). At this time, the switch (7) and the switch (12) are open and the circuit is interrupted, so that both the solar battery lamp (6) and the commercial power lamp (11) are turned off. I have.

The timer (5) is set to a predetermined time (for example,
Hour), set the timer at that time
(5) is operated, and the switch (7) and the switch (12) are closed. This connects the circuit to each lamp (6), (11),
Solar cell lamp (6) is an inverter (4) that performs cross-current conversion
After that, the electric power is supplied from the storage battery (3) and the lamp is turned on, and the commercial power supply lamp (11) is supplied with electric power from the commercial power supply (10) and turned on.

Lamp for solar cell (6) and lamp for commercial power supply
When (11) is turned on at the same time, the lamp becomes 80 W in total, and a desired illuminance can be secured.

The solar cell (1) is a 40 W solar cell lamp
(6) Since it is only necessary to generate power required for one lamp to be turned on, it is possible to use a small-sized device having a smaller power generation amount than the conventional one. Similarly, a small battery having a small capacity can be used as the storage battery (3). Since the solar cell (1) and the storage battery (3) can be miniaturized, facility costs are greatly reduced.

In the event of a power failure, a 40 W solar cell lamp (6)
Only the lamp is turned on, and the commercial power lamp (11) cannot be turned on. Therefore, the lamp becomes darker than usual, and the illuminance required for park lighting or the like cannot be secured. However, in an emergency, the purpose is different from normal, and it is only necessary to be able to indicate the position of an evacuation site, so there is no problem even if it is darker than normal,
As the surrounding lights are turned off due to a power outage, sufficient brightness can be secured for emergency use. Therefore, the solar cell lamp (6) needs to be determined in consideration of the brightness required at the time of power failure.

When a predetermined time (for example, 6 o'clock in the morning) is reached by the timer (5), the switches (7) and (12) are opened, and the solar cell lamp (6) and the commercial power lamp (11) are turned off. Is also disconnected from the power supply and goes out.

In this embodiment, the switches (7) and (12) are opened and closed by the timer (5). However, instead of the timer (5), the surrounding brightness is sensed and the brightness becomes darker than a certain level. It is also possible to use a sensor that closes the switches (7) and (12) upon detecting this and opens the switches (7) and (12) upon detecting that the surroundings have become bright to some extent.

When the timer (5) is used, the darkening time differs depending on the season, so the set time for opening and closing the switches (7) and (12) may be changed.

[Embodiment 2] FIG. 2 is a connection diagram of this embodiment. (21) is a 165W solar cell, (23) is 100A
h / 12V storage battery. These are all examples 1
It is smaller than.

A converter (27) is connected to the commercial power supply (10) and converts AC to DC, and functions as a charging device for the storage battery (23), but is normally disposed between the storage battery (23) and the converter. Since the switch (28) is open and the circuit is disconnected, no charging is performed.

An undervoltage relay (26) detects the voltage of the storage battery (23), and closes the switch (28) when it is detected that charging is not sufficient and the storage battery voltage is below a predetermined value. This undervoltage relay (26) is activated for a predetermined time by a timer (25).

The timer (25) is connected to the lamp switches (7) and (1).
It may be operated at the same time as the timer (5) that opens and closes 2), or it may be operated at another time (for example, one hour earlier than the timer (5)) by providing another independent timer. You may let it. In the present embodiment, the set time of the timer (25) is set at 5:00 pm when the sunlight becomes weak and power generation by the solar cell (21) cannot be expected so much.

When the switch (28) is closed, the storage battery (23)
The circuit between the converter and the converter (27) is connected, and the converter (2
The storage battery (23) is charged by the commercial power supply (10) via (8). From the viewpoint that charging by the solar cell (21) is used as much as possible and the insufficient charging is compensated for when charging is insufficient at the time of lighting, it is preferable that charging by the commercial power supply (10) be quick charging.

As described above, the daytime was bad weather and the solar cells (2
Even if the amount of power generated in 1) is small and the storage battery (23) is not sufficiently charged, the storage battery (23) is additionally charged by the commercial power supply (10), so that the solar battery lamp (6) is turned on at night. Secured.

Reference numeral (29) denotes a rectifying element for preventing backflow from the storage battery (23) to the converter (28), and is disposed between the two.

Storage battery by additional charging with commercial power supply (10)
When the voltage of (23) becomes a predetermined value or more, the undervoltage relay (26) detects this, and opens the switch (28) to open the storage battery (23).
And the converter (27) is disconnected, and the additional charging is terminated. Therefore, the storage battery (23) is not overcharged.

When the voltage of the storage battery (23) is equal to or higher than the predetermined value at the time of operation of the timer (25), the switch (28) is kept open because the solar battery (21) is already sufficiently charged. No additional charging from the commercial power supply (10) is performed.

The other parts are the same as in the first embodiment. Example 1
The reason why the solar cell (21) and the storage battery (23) are made more compact than in the case of (1) is that in this embodiment, it is possible to detect insufficient charging of the storage battery (23) and perform additional charging from the commercial power supply (10). This is because it is not necessary to allow a margin for the amount of power generated by the solar cell (21) and the capacity of the storage battery (23). Since the most expensive solar cell (21) can be further reduced, the equipment cost can be further reduced. Further, since the lamp is always turned on even after bad weather, the reliability as an emergency device is improved.

Even in the case of the present embodiment, if the power outage extends over a long period of several days or more and, at the same time, the bad weather conditions continue, the night immediately after the power outage turns on without any problem, Thereafter, the lighting time of the solar cell lamp becomes shorter. However, it is sufficient for emergency lighting immediately after a disaster, and does not cause much problem.

Not to mention examples of the Great Hanshin Earthquake and major earthquakes in various countries, electricity is the fastest in the lifeline of gas, water, electricity, etc., and most parts recover from a power failure the next day. . Therefore, turning on the solar cell lamps after the second day is not a very important problem, and if it is possible to guide residents by illuminating evacuation sites and emergency facilities immediately after a disaster and prevent panic, etc., it is sufficient for emergency lighting. It can be said that it fulfilled its role without any problem.

Of course, if the weather is fairly good,
Even if the power failure continues after the next day, it is needless to say that the solar cell (21) can charge the battery, so that it can be turned on every night as usual.

In each of the above embodiments, a lamp of 40 W was used for each lamp. However, the combination of the lamps may be appropriately determined according to the required illuminance. For example, when an illuminance equivalent to a 90 W lamp is obtained. It is preferable to use one 30W solar cell lamp and two 30W commercial power lamps.
Incidentally, in this case, the solar cell may be about 100 W, and the storage battery may be about 100 AH.

Since the wattage of the solar cell lamp and the commercial power supply lamp does not necessarily need to be unified, lamps having different wattage may be combined. Furthermore, two or more lamps with low power consumption may be used as solar cell lamps in consideration of lamp damage.
For example, a combination of two 20W solar cell lamps and a 40W commercial power lamp may be used.

[0053]

As described above, according to the present invention, even in the event of a power failure, it can be lit as emergency lighting, and in normal times, the surroundings of the installation location can be illuminated with sufficient brightness, and the equipment cost is small and the size is small. A lighting device which does not impair the appearance can be provided. Further, it is possible to provide a lighting device that can be used without any trouble even after a bad weather day continues.

[Brief description of the drawings]

FIG. 1 is a connection diagram of a first embodiment.

FIG. 2 is a connection diagram of a second embodiment.

FIG. 3 is a connection diagram of a conventional example.

[Explanation of symbols]

 (1), (21) Solar cell (2) Charge / discharge control device (3), (23) Storage battery (4) Inverter (5) Timer (6) Lamp (for solar cell) (10) Commercial power supply (11) Lamp (For commercial power supply) (7), (12) Switch (26) Undervoltage relay (27) Converter (charger)

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme Court II (Reference) F21Y 101: 00 F21S 1/10 A Q (72) Inventor Kenji Hayashi 6-27 Nakanoshima, Kita-ku, Osaka Stock Company Inside Kansai Tec

Claims (2)

[Claims] 1. A solar battery, a storage battery charged by the solar battery, a solar battery lamp that is lit by power supply from the storage battery, and a solar battery lamp that is separately powered from a commercial power supply and lit. It is equipped with a commercial power supply lamp, and the illuminance is higher than the illuminance required in normal conditions when both the solar cell lamp and the commercial power lamp are lit, and is lower than the illuminance required in normal times when the solar cell lamp alone is lit. Lighting equipment. 2. A voltage detecting device for detecting a voltage of a storage battery at a predetermined time, and a power supply for detecting the voltage of the storage battery by a commercial power supply when the voltage detection device detects that the voltage of the storage battery is equal to or lower than a predetermined value. The lighting device according to claim 1, further comprising a charging device capable of charging.