JPH11307275A - Lighting equipment - Google Patents

Abstract

(57) [Problem] To provide an illuminating device which is installed outdoors and can surely light a light source when a commercial power supply is cut off at night or when the surroundings are dark. A control unit (4) constantly monitors whether or not the commercial power supply (AC) is energized. When a commercial power supply (AC) is energized, a switching circuit (5) is connected so that the charging circuit unit (1) and the secondary battery (E) are connected.
And the switching circuit 6 is controlled so that the light source 2 and the ballast 8 are connected. On the other hand, when detecting a power failure of the commercial power supply AC, the control unit 4 controls the switching circuit 5 so that the secondary battery E and the lighting circuit unit 3 are connected, and connects the light source 2 and the lighting circuit unit 3. The switching circuit 6 is controlled in such a manner as to be performed. Further, when the illuminance detected by the light detection unit 7 is higher than the first predetermined illuminance, the control unit 4 stops the oscillation of the lighting circuit unit 3 so that the light source 2 is not turned on. When the detected illuminance is lower than the second predetermined illuminance, the lighting circuit unit 3 starts oscillating. Therefore, the light source 2 is turned on by the lighting circuit unit 3 using the secondary battery E as a power supply.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Hitherto, there has been provided a lighting device such as a street lamp which is installed outdoors and turns on a light source using a commercial power supply as a power source when the surroundings become dark. However,
In this type of lighting device, the light source cannot be turned on when a commercial power supply is interrupted, so that it may not be useful in a disaster.

By the way, an emergency light which is installed indoors and turns on a light source using a secondary battery as a power source when a commercial power supply is cut off has a structure shown in FIG. FIG.
The emergency light shown in FIG. 1 is inserted between the commercial power supply AC and the secondary battery E and charges the secondary battery E, and a lighting circuit for lighting the light source 2 composed of a lamp using the secondary battery E as a power source. Unit 3. Further, a control unit 4 that controls each of the switching circuits 5 and 6 described below is connected between output terminals of the charging circuit unit 1. Here, the switching circuit 5 is a circuit for selectively connecting either the charging circuit unit 1 or the lighting circuit unit 3 to the secondary battery E. The switching circuit 6 is a circuit for selectively connecting one of the lighting circuit unit 3 and the ballast 8 to the light source 2. The ballast 8 is powered by the commercial power supply AC to turn on the light source 2, and a switch SW is inserted between the commercial power supply AC and the ballast 8.

[0004] When the commercial power supply AC is energized, the control unit 4
The switching circuit 5 is controlled so that the charging circuit unit 1 and the secondary battery E are connected, and the switching circuit 6 is controlled so that the light source 2 and the ballast 8 are connected. Therefore, when the commercial power supply AC is energized, the secondary battery E is charged (trickle charging) from the commercial power supply via the charging circuit unit 1 so as to be fully charged. The light source 2 is connected to the switch S
When W is on, the ballast 8 is turned on using the commercial power supply AC as a power supply.

When detecting a power failure of the commercial power supply AC, the control unit 4 controls the switching circuit 5 so that the secondary battery E and the lighting circuit unit 3 are connected, and also controls the light source 2 and the lighting circuit unit 3. And the switching circuit 6 is controlled so that Therefore, at the time of a power failure of the commercial power supply AC, the light source 2 is turned on by the lighting circuit unit 3 using the secondary battery E as a power supply.

[0006]

However, when an emergency light having a circuit configuration as shown in FIG. 5 is installed outdoors, the light source 2 is always turned on at the time of a power failure, so that when the surroundings are bright as in the daytime. Also, there is a problem that the light source 2 is turned on. Thereafter, when the commercial power supply AC is energized, the secondary battery E is trickle-charged, but it takes a very long time to fully charge the secondary battery E (the secondary battery E is completely discharged). In this case, it takes about 48 hours), which may be useless in an emergency such as a nighttime disaster. Moreover, in summer, the daytime temperature becomes particularly high, so if the light source 2 is turned on in the daytime, the thermal stress on the secondary battery E and other circuit components increases, which causes a failure and a shortened life. Might be.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an illuminating device which is installed outdoors and which can reliably turn on a light source when a commercial power supply is cut off at night when the surroundings are dark. Is to provide.

[0008]

According to a first aspect of the present invention, there is provided a charging circuit for charging a secondary battery inserted between a commercial power supply and the secondary battery. When,
Illuminance detection means for detecting ambient illuminance; and when the commercial power supply is at least interrupted and the illuminance detected by the illuminance detection means is smaller than a predetermined illuminance, the light source is turned on using the secondary battery as a power source, and the detection by the illuminance detection means is performed. Lighting control means for prohibiting the lighting of the light source when the illuminance is greater than a predetermined illuminance. Lighting can be prevented, and unnecessary discharge of the secondary battery can be eliminated, so that the light source can be reliably turned on when the commercial power supply is interrupted, for example, at night when the surroundings are dark. In addition, since it is possible to prevent the light source from being turned on during the daytime in summer or the like, thermal stress on the secondary battery and other circuit components can be reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided charging control means for inhibiting charging of the secondary battery by the charging circuit when the illuminance detected by the illuminance detecting means is larger than a specified illuminance. It is possible to prevent the rechargeable battery from being charged when the temperature is high, such as during the daytime in summer, and to reduce the life of the rechargeable battery.

According to a third aspect of the present invention, in the first aspect of the present invention, when the illuminance detected by the illuminance detection means is larger than the specified illuminance, the charging current of the secondary battery by the charging circuit unit is smaller than the specified illuminance. In the case that the charging current is smaller than the charging current in the case, the charging current of the secondary battery when the surroundings are bright such as during the daytime should be smaller than the charging current when the surroundings are dark such as at night. Thus, charging of the secondary battery can be performed efficiently, and shortening of the life of the secondary battery can be suppressed.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, a temperature detecting means for detecting an ambient temperature is provided, and when the temperature detected by the temperature detecting means is higher than a predetermined temperature, the charging circuit is used. Since there is a charge stopping means for stopping charging of the secondary battery, it is possible to prevent the charging of the secondary battery when the ambient temperature is high, such as during the daytime in summer, and to shorten the life of the secondary battery. Can be suppressed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) As shown in FIG. 1, a lighting device according to this embodiment has a commercial power supply AC and a secondary battery E.
And a lighting circuit unit 3 for charging (trickle charging) the secondary battery E and lighting a light source 2 composed of a lamp using the secondary battery E as a power source.
Further, a control unit 4 that controls each of the switching circuits 5 and 6 described below is connected between output terminals of the charging circuit unit 1. Here, the switching circuit 5 connects the charging circuit unit 1 to the secondary battery E.
And a lighting circuit section 3 for selectively connecting either one of them. The switching circuit 6 is a circuit for selectively connecting one of the lighting circuit unit 3 and the ballast 8 to the light source 2. The ballast 8 is supplied with electric power from the commercial power supply AC to turn on the light source 2. A switch SW is inserted between the commercial power supply AC and the ballast 8. Has an EE switch 9 inserted therein. The EE switch 9 is a switch that is turned on when the illuminance falls below a preset illuminance, and turned off when the illuminance exceeds a preset illuminance.

The control unit 4 controls each switching circuit based on the presence / absence of energization of the commercial power supply AC (energization and power outage) and the illuminance detected by a light detection unit 7 (illuminance detection means) such as an illuminance sensor for detecting ambient illuminance. 5, 6 and the lighting circuit unit 3 are controlled.
The lighting circuit unit 3 outputs the DC output of the secondary battery E to the light source 2.
It is composed of an inverter that converts the output into an AC output necessary for lighting.

Next, the operation of the control section 4 will be specifically described. The control unit 4 constantly monitors whether or not the commercial power source AC is energized, and controls the switching circuit 5 so that the charging circuit unit 1 and the secondary battery E are connected when the commercial power source AC is energized. The switching circuit 6 is controlled so that the light source 2 and the ballast 8 are connected. Therefore, the commercial power supply A
When power is supplied to C, trickle charging is performed from the commercial power supply AC via the charging circuit unit 1 so that the secondary battery E is fully charged. When the switch SW is turned on and the EE switch 9 is turned on, the light source 2 is turned on by the ballast 8 using the commercial power supply AC as a power source.
When the switch 9 is off, it does not light.

When detecting a power failure of the commercial power supply AC, the control unit 4 controls the switching circuit 5 so that the secondary battery E and the lighting circuit unit 3 are connected, and also controls the light source 2 and the lighting circuit unit 3. And the switching circuit 6 is controlled so that Further, the control unit 4 determines that the illuminance detected by the light detection unit 7 is the first predetermined illuminance (in this embodiment, 100 lux to 400 lux).
Lux can be set within the range of lux), the oscillation of the lighting circuit unit 3 is stopped and the light source 2
Is not turned on, and the illuminance detected by the light detection unit 7 is the second predetermined illuminance (in the present embodiment, 20 lux to 80 lux).
If it is lower than the lux range, the lighting circuit unit 3 starts oscillating. Therefore, the light source 2 is turned on by the lighting circuit unit 3 using the secondary battery E as a power supply. Here, the reason why the first predetermined illuminance and the second predetermined illuminance are made different to have hysteresis is as follows.
This is for preventing the light source 2 from blinking. In this embodiment,
The control unit 4 constitutes lighting control means.

As shown in FIG. 2, the lighting circuit block 10 including the charging circuit 1, the lighting circuit 3, the control unit 4, the switching circuit 5, and the switching circuit 6, and the rechargeable battery E, as shown in FIG. Will be delivered to The device case 20 is fixed to the utility pole 40 using an annular mounting band 17 or the like, and the street light body 30 in which the light source 2 and the ballast 8 are disposed is mounted on the utility pole 40 using the annular mounting band 18 or the like. Fixed to As shown in FIG. 2, the light detection unit 7 is provided at a lower end of the device case 20 and detects illuminance below the device case 20. The circuit provided in the device case 20 and the light source 2 and the ballast 8 provided in the street light main body 30 are appropriately connected by the joint cable 16.
Here, since the device case 20 draws out the power line 15 and the joint cable 16 for connecting the commercial power supply AC from below, it is possible to prevent rainwater or the like from entering the device case 20. it can.

In the lighting device of the present embodiment, it is possible to prevent the light source 2 from being turned on when the commercial power supply is cut off in a situation where the surroundings are bright, such as during the daytime. Since the discharge can be eliminated, the light source 2 can be reliably turned on when the commercial power supply AC is interrupted, for example, at night when the surroundings are dark. In addition, when the commercial power supply AC is interrupted during the daytime in summer or the like, it is possible to prevent the light source 2 from being turned on using the secondary battery E as a power source, so that thermal stress on the secondary battery E and other circuit components is reduced. Can be reduced.

(Embodiment 2) The basic configuration and the basic operation of the illumination device of this embodiment shown in FIG. 3 are almost the same as those of Embodiment 1 shown in FIG. It is characterized in that the charging circuit unit 1 is also controlled based on the detected illuminance. Note that the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In the present embodiment, the control unit 4 includes the light detection unit 7
If the detected illuminance is higher than the specified illuminance (in this embodiment, the illuminance is set in a range of 10 lux to 100 lux), the charging circuit unit 1 is controlled so that the secondary battery E is not charged. When the illuminance detected by the light detection unit 7 is lower than the specified illuminance (set in the range of 10 lux to 100 lux in the present embodiment), the secondary battery is charged by the charging circuit unit 1 using the commercial power supply AC as a power supply. The charging circuit unit 1 is controlled so that E is charged. Here, since the charging circuit unit 1 performs charging with a current of, for example, 0.04 CA, the capacity of the secondary battery E becomes, for example, 2500
mAh, the charging current is 100 mA (= 2500 ×
0.04). At the start of charging, the battery is charged with a relatively large charging current of 2.5 A (= 1 CA) for about one hour, and then charged with a relatively small charging current (10 mA to 50 mA).
). In this embodiment,
The control unit 4 constitutes lighting control means and charging control means.

Thus, in the lighting device according to the present embodiment, the secondary battery E can be prevented from being charged or discharged when the temperature is high, such as during the daytime in summer, and the short-circuit of the secondary battery E can be prevented. Life extension can be suppressed.

(Embodiment 3) By the way, in Embodiment 2, when the illuminance detected by the light detector 7 is higher than the specified illuminance, the control circuit 4 controls the charging circuit so that the secondary battery E is not charged. The unit 1 is controlled. On the other hand, the basic configuration of the lighting device of the present embodiment is the same as that of the second embodiment,
When the illuminance detected by the light detection unit 7 is higher than the specified illuminance, the control unit 4 performs charging so as to perform charging with a low-rate charging current (about 10 mA to 20 mA) that compensates for self-discharge of the secondary battery E. It is characterized in that the circuit unit 1 is controlled.
In the present embodiment, the control unit 4 constitutes lighting control means and charging control means.

Thus, in the present embodiment, the charging current of the secondary battery E when the surroundings are bright such as during the day can be made smaller than the charging current when the surroundings are dark such as at night. Charge the secondary battery E efficiently and use the secondary battery E
Can be prevented from being shortened.

(Embodiment 4) By the way, in each of the above embodiments, the control unit 4 performs various controls based on the illuminance detected by the light detection unit 7. However, in the configuration shown in FIG. 1 or FIG. A temperature sensor serving as a temperature detecting means is connected to the control unit 4, and the control unit 4 stops the charging of the secondary battery E by the charging circuit unit 1 when the temperature detected by the temperature sensor is higher than a predetermined temperature. A charging stop means for controlling the unit 1 is provided.

In this embodiment, as shown in FIG. 4, the street light body 30 and the device case 2 in the first embodiment are used.
0 is integrally formed, so that the joint cable 1
6 (see FIG. 2) becomes unnecessary. In each of the above embodiments, in the present embodiment, the provision of the charge stopping means can prevent the charging of the secondary battery E when the ambient temperature is high, and It is possible to suppress shortening of the life of E.

[0025]

According to the first aspect of the present invention, there is provided a secondary battery, a charging circuit inserted between a commercial power supply and the secondary battery for charging the secondary battery, illuminance detecting means for detecting ambient illuminance, At least when the commercial power supply is out of power and the illuminance detected by the illuminance detection means is smaller than a predetermined illuminance, the light source is turned on using the secondary battery as a power source, and when the illuminance detected by the illuminance detection means is larger than a predetermined illuminance, Since lighting control means for prohibiting lighting of the light source is provided, it is possible to prevent the light source from being turned on when the commercial power supply is interrupted in a bright surrounding such as during the daytime, and to make unnecessary use of the secondary battery unnecessary. Since the discharge can be eliminated, there is an effect that the light source can be surely turned on when the commercial power supply is interrupted, for example, at night when the surroundings are dark. In addition, since it is possible to prevent the light source from being turned on during the daytime in summer or the like, there is an effect that thermal stress on the secondary battery and other circuit components can be reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided charging control means for prohibiting charging of the secondary battery by the charging circuit when the illuminance detected by the illuminance detecting means is larger than a specified illuminance. It is possible to prevent the rechargeable battery from being charged when the temperature is high, such as during the daytime in summer, and to reduce the life of the rechargeable battery.

According to a third aspect of the present invention, in the first aspect of the invention, when the illuminance detected by the illuminance detecting means is larger than the specified illuminance, the charging current of the secondary battery by the charging circuit unit is smaller than the specified illuminance. In the case that the charging current is smaller than the charging current in the case, the charging current of the secondary battery when the surroundings are bright such as during the daytime should be smaller than the charging current when the surroundings are dark such as at night. Thus, there is an effect that the charging of the secondary battery can be performed efficiently and the shortening of the life of the secondary battery can be suppressed.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, there is provided a temperature detecting means for detecting an ambient temperature, and when the temperature detected by the temperature detecting means is higher than a predetermined temperature, the charging circuit is used. Since there is a charge stopping means for stopping charging of the secondary battery, it is possible to prevent the charging of the secondary battery when the ambient temperature is high, such as during the daytime in summer, and to shorten the life of the secondary battery. There is an effect that formation can be suppressed.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing a first embodiment.

FIG. 2 is a schematic configuration diagram of the above.

FIG. 3 is a circuit block diagram showing a second embodiment.

FIG. 4 is a schematic configuration diagram showing a fourth embodiment.

FIG. 5 is a circuit block diagram showing a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 charging circuit section 2 light source 3 lighting circuit section 4 control section 5 switching circuit 6 switching circuit 7 light detection section 8 ballast 9 EE switch AC commercial power supply E secondary battery

Claims (4)

[Claims] A secondary battery; a charging circuit inserted between the commercial power supply and the secondary battery for charging the secondary battery; illuminance detection means for detecting ambient illuminance; When the illuminance detected by the illuminance detecting means is smaller than a predetermined illuminance, the light source is turned on using the secondary battery as a power source, and when the illuminance detected by the illuminance detecting means is larger than the predetermined illuminance, the lighting of the light source is prohibited. A lighting device comprising: a control unit. 2. The lighting device according to claim 1, further comprising charge control means for prohibiting charging of the secondary battery by the charging circuit when the illuminance detected by the illuminance detection means is greater than a specified illuminance. 3. A charging control means for reducing the charging current of the secondary battery by the charging circuit when the detected illuminance detected by the illuminance detecting means is larger than the specified illuminance as compared with the charging current when the detected illuminance is smaller than the specified illuminance. The lighting device according to claim 1, further comprising: 4. A charge detecting device comprising: temperature detecting means for detecting an ambient temperature; and charge stopping means for stopping charging of the secondary battery by the charging circuit when the temperature detected by the temperature detecting means is higher than a predetermined temperature. The lighting device according to claim 1, wherein: