JPH0213440B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an emergency lighting device.

In general, guide light systems and emergency lighting systems are
In order to clearly indicate the evacuation exit and evacuation route in the event of a power outage, the emergency lighting is configured to turn on in the event of a power outage, but it is also required to be turned on at all times to alert occupants and passersby. There is.

As shown in Figure 1, the conventional emergency lighting system uses power lines A ₁ , A ₂ , A ₃ drawn out from a commercial power source 1.
multiple emergency lighting devices are connected in parallel.

This emergency lighting equipment consists of a charging circuit a that is constantly supplied with power from a commercial power source 1 and a regular lighting circuit b.
and a transistor inverter c, which is supplied with power from the charging circuit a during a power outage, and connected to the power supply line.
By opening and closing the switch 11 inserted in A ₁ , the power supply to the charging circuit a continues at all times, and the power supply to the normal lighting circuit b can be interrupted without turning on the emergency lighting. By opening the switch 11 when no one is present at the installation location, power supply to the regular lighting circuit b can be stopped, thereby reducing power consumption.

To explain in more detail, this emergency lighting equipment uses power lines A ₁ , A ₂ , A ₃ drawn out from commercial power supply 1.
When the commercial power supply 1 is normal, the storage battery 9 is charged via the power transformer 5, the bridge rectifier 6, and the charging resistor 7, and the power supply lines A2 and A are connected to the terminals ₂ to 4. The power failure detection relay 10 is energized by the voltage between ₃ and the relay contacts 10a, 10
b, 10c to NO side, commercial power supply 1 → switch 11 → power line A ₁ → terminal 2 → check coil 1
2→Relay contact 10a→Fluorescent lamp 13→Relay contact 10b→Parallel circuit of glow starter 14 and noise prevention capacitor 14'→Fluorescent lamp 13→
Inspection switch 15 → terminal 3 → power line A ₂ → start the fluorescent lamp 13 through the path of commercial power supply 1, commercial power supply 1 → switch 11 → power line A ₁ → terminal 2 → check coil 12 → relay contact 10a → fluorescent lamp 1
3 → Inspection switch 15 → Terminal 3 → Power line A ₂ → The fluorescent lamp 13 is turned on normally through the route of commercial power supply 1.

On the other hand, when the commercial power supply 1 has a power outage, charging of the storage battery 9 is stopped, and excitation of the power outage detection relay 10 is also stopped, so that relay contacts 10a, 10b, and 10c are closed to NC.
It falls to the side, and power is supplied from the storage battery 9 to the transistor inverter c through the relay contact 10c, and the transistor inverter c starts high-frequency oscillation.
This high frequency oscillation output causes relay contacts 10a, 1
The fluorescent lamp 13 is turned on in an emergency through 0b and 10c.

In such a conventional emergency lighting device, by performing three-wire wiring, the power supply to the charging circuit a of the emergency lighting device is continued, and the fluorescent lamp 13 can be turned on and off at all times without turning on the lamp in an emergency. It was configured so that it could be switched, but the power line
The number of wires for A ₁ to _{A 3} was as large as three, which resulted in high wiring costs and not easy wiring. Also,
For emergency lighting equipment that uses two-wire wiring, it is necessary to install one more wire, but there have been inquiries that this wiring work is either impossible or expensive.

Another conventional emergency lighting device, as shown in FIG. 2, removes the power line A ₁ and switch 11 in FIG. This is an emergency lighting device with a common connection.

This emergency lighting system uses two-wire wiring, so
Although the number of wires is reduced and the wiring cost is reduced, power is commonly supplied to the charging circuit a and the normal lighting circuit b of the emergency lighting equipment, so the emergency lighting is performed while the power is continued to be supplied to the charging circuit a. It was not possible to turn the fluorescent lamp 13 on and off at all times without causing the problem.

Therefore, the problems of the above two conventional examples can be solved. That is, an emergency lighting device has been proposed that can continue supplying power to a charging circuit using two-wire wiring and can switch a fluorescent lamp between on and off at all times without having to turn on the lamp in an emergency.

This emergency lighting device, as shown in Figure 3,
A voltage switching circuit is interposed between the commercial power supply 1 in FIG. 2 and the emergency lighting device' to switch the voltage applied to the emergency lighting device from high to low. This voltage switching circuit is composed of a transformer 16 and interlocking switches 17A and 17B, and by switching the switches 17A and 17B in the opposite manner to the state shown in FIG. By switching the switches 17A and 17B to the illustrated state, the voltage V _T output from the intermediate tap of the transformer 16 is applied to the emergency lighting equipment'. this voltage
V _T is set to a value lower than the turning-off voltage of the fluorescent lamp 13 and higher than the holding voltage of the power failure detection relay 10 .

The operation will be explained. Switch 17A, 17
When B is switched to the opposite state as shown in Fig. 3, the voltage of commercial power supply 1 is directly applied to the emergency lighting equipment'.
As in the case of FIG. 2, the fluorescent lamp 13 is normally turned on and the storage battery 9 is charged.

Further, when the switches 17A and 17B are changed to the state shown in FIG. 3, voltage V _T is applied to the emergency lighting equipment', causing the fluorescent lamp 13 to go out, while the power failure detection relay 10 is in the holding state and the relay contact is Since the transistors 10a, 10b, and 10c are each switched to the NO side, no power is supplied to the transistor inverter c and no emergency lighting is performed.

In this way, the emergency lighting device of the proposed example can switch on and off the fluorescent lamp 13 at any time using two-wire wiring, independently of the charging of the storage battery 9, and without turning on the fluorescent lamp 13 in an emergency. However, since the charging current to the storage battery 9 is set to be the optimum value when the voltage of the commercial power supply 1 is directly applied to the charging circuit a, the voltage applied to the charging circuit a is different from the power supply voltage. When the voltage drops to V _T , the charging current decreases and the storage battery 9 becomes insufficiently charged, causing the problem of shortening the emergency lighting time of the fluorescent lamp 13. In addition, the lack of capacity causes a drop in the voltage of the storage battery 9, resulting in a power outage. There was a risk that the fluorescent lamp 13 would not turn on in an emergency.

Therefore, an object of the present invention is to be able to continue supplying power to the charging circuit using two-wire wiring, and to switch the fluorescent lamp between constant lighting and extinguishing without having to turn on the lamp in an emergency, while also reducing the lighting performance in an emergency. An object of the present invention is to provide an emergency lighting device that does not cause any damage.

An embodiment of this invention is shown in FIGS. 4 and 5. That is, as shown in FIG. 4, in this emergency lighting device, the voltage applied to the charging circuit a is detected by the voltage detection circuit d, and when the voltage detection circuit d detects the power supply voltage, the voltage applied to the charging circuit a is detected by the switching circuit e. The high-voltage current-limiting circuit f with a large limiting amount is used to charge the battery, and when the voltage detection circuit d detects the voltage V _T , the low-voltage current-limiting circuit g with a small limiting amount is used to charge the battery, and the battery is transferred to the charging circuit a. The optimum charging current is made to flow through the storage battery 9 both when the applied voltage is the power supply voltage and when the voltage V _T is applied. The rest of the configuration is the same as that in FIG. 3.

The operation of this emergency lighting device will be explained in detail based on FIG. Switches 17A and 17B are the fifth
When the state is reversed to that shown in the figure, the voltage of the commercial power source 1 is directly applied to the emergency lighting device', and the fluorescent lamp 13 is normally lit as in the case of FIG. At this time, the power supply voltage is also applied to the charging circuit a, and the voltage obtained by smoothing the output voltage of the bridge rectifier 6 with the capacitor 18 makes the Zener diode 19 conductive. As a result, the transistor 20 becomes conductive, and
Therefore, the transistor 21 is cut off, the transistor 22 is cut off, and the storage battery 9 is current-limited by the resistors 23 and 24 and charged at the optimum charging current value.

Further, when the switches 17A and 17B are changed to the state shown in FIG. 5, voltage V _T is applied to the emergency lighting equipment', causing the fluorescent lamp 13 to go out, while the power failure detection relay 10 is in the holding state and the relay contact is Since the transistors 10a, 10b, and 10c are each switched to the NO side, no power is supplied to the transistor inverter c and no emergency lighting is performed. At this time, voltage V _T is applied to charging circuit a, and capacitor 1
8 cannot make the Zener diode 19 conductive. As a result, transistor 20 is cut off, transistor 21 is therefore conductive, transistor 22 is conductive, and storage battery 9 is current-limited only by resistor 24 and charged with the same optimal charging current as in the above case. 25 to 29 are resistors. However, the resistors 23 and 24 are used in place of the resistor 7 in FIG.
The value is set so that an optimal charging current flows through the storage battery 9 both when V _T is applied.

As a result of this configuration, power can be continuously supplied to the charging circuit using two-wire wiring similar to the one shown in FIG. Even when the switching circuit turns on and off the fluorescent lamp 13, the optimal charging power can always be supplied to the storage battery 9, so that the storage battery 9 will not be undercharged, which will deteriorate the emergency lighting performance. Never.

Note that if the value of voltage V _T is set lower than the discharge starting voltage of glow starter 14, glow starter 1
Power consumption due to the discharge of step 4 is also eliminated, making it possible to further reduce power consumption.

As described above, the emergency lighting device of this invention is
a power source that can switch the voltage between high and low; a regular lighting circuit that lights up the fluorescent lamp when high voltage power is supplied from the power source and turns off the fluorescent lamp when low voltage power is supplied from the power source; and a storage battery that is supplied with power from the power source. a charging circuit that charges the charging circuit; a voltage detection circuit that detects the level of the voltage applied to the charging circuit; an inverter that is supplied with power from the storage battery to turn on the fluorescent lamp in an emergency; Since it is equipped with a power failure detection circuit that starts power supply from the storage battery to the inverter in the event of a power outage, the power supply to the charging circuit can be continued through two-wire wiring, and the fluorescent lamps can be turned on and off for regular use without emergency lighting. This has the effect that the charging current of the storage battery can be maintained at an optimum level without deteriorating the emergency lighting performance.

[Brief explanation of drawings]

Figure 1 is a circuit diagram of a conventional emergency lighting system, Figure 2 is a circuit diagram of a conventional emergency lighting system.
The figure is a circuit diagram of another conventional emergency lighting device, FIG. 3 is a circuit diagram of a proposed emergency lighting device, FIG. 4 is a schematic block diagram of an embodiment of the present invention, and FIG. 5 is a specific example thereof. It is a circuit diagram. 1...Commercial power supply,'...Emergency lighting equipment,
a... Charging circuit, b... Regular lighting circuit, c...
...Transistor inverter, 10...Power failure detection relay, d...Voltage detection circuit, e...Switching circuit, f...High voltage current limiting circuit, g...Low voltage current limiting circuit,...Voltage switching circuit.

Claims (1)

[Claims] 1. A power supply that can switch the voltage between high and low, a regular lighting circuit that lights up the fluorescent lamp when high voltage power is supplied from the power supply and turns off the fluorescent lamp when low voltage power is supplied from the power supply, and a regular lighting circuit that is supplied with power from the power supply. A charging circuit that charges a storage battery, a voltage detection circuit that detects the level of voltage applied to this charging circuit, and a limiting amount of the charging circuit that increases in response to the level of voltage detected by this voltage detection circuit. - a switching circuit that switches to a low voltage; an inverter that is supplied with power from the storage battery to turn on the fluorescent lamp in an emergency; and an inverter that cuts off power supply from the storage battery to the inverter when the power source outputs high voltage and low voltage; an emergency lighting device comprising: a power outage detection circuit that starts power supply from the storage battery to the inverter in the event of a power outage;