JPS5840317B2 - Emergency light lighting device - Google Patents

Description

[Detailed Description of the Invention] This invention turns on the light using commercial power during non-power outages, charges the battery power at the same time, and connects the power supply path from the commercial power to the light source when the voltage of the commercial power decreases due to a power outage. The present invention relates to an emergency light lighting device that opens a circuit and closes a power supply path from a battery.

Normally, when emergency lighting equipment with a built-in battery is installed after being manufactured, the charging circuit and battery must be disconnected and pressed, and after the installation work is completed, it is necessary to turn on the power and connect it.

However, when installing the appliance, sometimes people forget to connect the battery to the charging circuit, and the battery is not exposed, so when there is no power outage, the appliance appears to be lighting normally and the battery is charging. There is a risk that the batteries will self-discharge and not turn on at all during a power outage, meaning that they will not function as emergency lights.

In order to eliminate this risk, this invention clearly indicates that if the battery is disconnected during a non-power outage, the light source is turned off so that the malfunction of the lighting equipment can be easily discovered from outside the equipment, and the battery is disconnected. The purpose is to prevent devices from being left unconnected.

The details of the invention will be explained below with reference to embodiments shown in the drawings.

FIG. 1 shows the basic circuit configuration of this invention.

1 is a commercial power source, and 2 is a light source and its lighting device if necessary. The light source 2 may be either an incandescent lamp or a discharge lamp, and is connected to the commercial power source 1 via an AC power switch device 3.

The AC power supply switch device 3 is a bidirectional switch such as a triac.
Pole → Thyristor, transistor, relay, etc.

A droplet converter 9 is connected to the commercial power supply 1, and the dropped secondary voltage is rectified by a rectifier 4 and sent to the battery 8 via a charging current limiting resistor 5 and a commercial power supply voltage detection device 6. Connected.

The battery 8 is connected to the light source 2 via a battery power switch device 7 that closes when the voltage of the commercial power source 1 abnormally drops due to a power outage.

A commercial power supply voltage detection device 6 is connected to the battery power switch device 7 and is switched on and off according to the voltage of the commercial power supply.

As shown in the specific circuit configuration described later, the light source 2 may or may not be the same as the light source 2 that is powered by a commercial power source and the light source 2 that is powered by a battery power source.

Next, the operation will be explained.

When a voltage is applied from the commercial power source 1 to the rectifier 4 via the step-down transformer 9 during a non-power outage, a voltage rectified by the rectifier 4 is generated, so if the battery 8 is connected normally, the charging current limiting resistor 5 The battery 8 is charged via.

At this time, a charging current flows through the charging current limiting resistor 5, causing a potential drop, which causes a drop in the potential of the AC power supply switch device 3.
When the light source 2 is applied to the commercial power source 1, the circuit is closed and the light source 2 lights up as if it were connected to the commercial power source 1.

If the battery 8 is not connected, no charging current flows, so no potential drop occurs in the charging current limiting resistor 5, the AC power switch device 3 is opened, and the light source 2 does not light up.

Since the fact that the unplugged battery 8 is not connected can be displayed easily from outside the appliance by not lighting it up, it can be easily found from outside the appliance, so forgetting to connect the battery 8 can be reliably prevented.

Furthermore, when a person notices that the fixture is not lit, he or she simply checks it and connects the battery, and since a charging current flows, the light source 2 lights up, and no special operation is required to restore the fixture, making it easy to handle.

Next, if the voltage of the commercial power supply 1 drops abnormally due to a power outage, the charging current will decrease even if the battery 8 is connected.
Or it disappears, so the potential drop of the charging current limiting resistor 5 also decreases and even disappears, so the AC power switch device 3 opens and the circuit between the light source 2 and the commercial electric board 1 is cut off.

Then, the battery power switch device 7 is closed by the commercial power supply voltage detection device 6, power is supplied from the battery 8 to the light source, and the light source 2 is turned on in an emergency.

When the power outage ends and the commercial power supply voltage 1 rises, the battery power switch device 7 is opened by the commercial power supply voltage detection device 6, and the charging current flows again, causing the potential drop in the charging current limiting resistor 5 to switch the AC power supply switch device. 3 is a closed circuit,
The light source 2 is turned on by the commercial power supply 1.

As will be explained later in the embodiment, the commercial power supply voltage detection device 6
The position of is arbitrary, depending on the nature of the specific device, as long as it can detect the voltage of the commercial power source 1 and open/close the battery power switch device I.

FIG. 2 shows a specific circuit configuration diagram of an embodiment of the present invention.

The same parts as in FIG. 1 are given the same reference numerals.

During non-power outage, the excitation coil 17 of the relay as the commercial power supply voltage detection device 6 is excited by the commercial power supply 1, and the contact piece 16 of the relay as the battery power switch device 7 and the battery 8 are excited.
Connect to charging resistor 5.

The voltage induced on the secondary side of the step-down transformer 9 is rectified by the rectifier 4 and charges the battery 8 via the charging current limiting resistor 5 and the battery power switch device 7.

Due to the potential drop across the charging current limiting resistor 5 due to the charging current at this time, a gate signal is applied to the gate of the thyristor 14 via the resistor 15 from the bidirectional three poles of a triac etc. as the AC power switch device 3, and the thyristor 14
Since the voltage of the commercial power supply 1 is applied to the discharge lamp 11 via the ballast 10, the starting device 12 is activated and the discharge lamp 11 is activated.
lights up.

However, when the battery 8 is not connected, no charging current flows, so no gate signal is generated due to the potential drop across the charging resistor 5, the thyristor 14 is opened, and the discharge lamp 11 is not lit. Abnormalities can be easily detected at a glance from outside the device.

When the user notices that the discharge lamp 11 is not lit and connects the battery 8, a charging current flows, the thyristor 14 is closed, and the discharge lamp 11 is lit.

If the voltage of the commercial power supply 1 drops abnormally due to a power outage, etc., the voltage induced on the secondary side of the step-down transformer 9 will also drop, so the charging current will also decrease or stop, causing the charging current limiting resistor 5 to drop.
Since the potential drop at is also reduced or eliminated, no gate signal is generated and the thyristor 14 is opened.

Further, the relay contact piece 16 is actuated by the excitation coil 17 of the relay, thereby connecting the battery 8 to the lamp 13 and lighting it.

When the power outage is restored and the voltage of the commercial power supply 1 becomes normal, the contact piece 16 of the relay is operated by the excitation coil 17, and a charging current flows to the battery 8, which causes the thyristor 14 that receives the gate signal to close and discharge. The electric light 11 is turned on.

FIG. 3 shows a specific circuit configuration diagram of another embodiment of the present invention.

The same parts as in FIG. 1 are given the same numbers.

In this embodiment, the light source that is turned on when there is no power outage and the light source that is turned on when there is a power outage are the same, and a fluorescent lamp is used as the light source.

The circuit configuration will be explained.

The filament f1 of the fluorescent lamp 11 is connected to one end of the commercial power supply 1 via the ballast 10 in series, and the other end of the commercial power supply is connected to the power supply. The filament f2 on the opposite side of the fluorescent lamp 11 is connected through the filament f2.

Both filaments f1. of the fluorescent lamp 11. The other end KVi of each of f2 is connected to a starting element 12 which is activated when the light is turned on by the commercial power source 1.

One end of the filament f2 of the fluorescent lamp 11 connected to the starting element 12 is connected to one end of the output winding a of the transformer 15 via a capacitor 14-, and the other filament f1 is connected to the output winding a. The other end of line a is connected.

Further, a preheating winding is connected to both ends of the filament f1 via a capacitor 13.

For example, the primary side of the transformer 15 has a frequency of 16 to 40 KHz.
An inverter 16 is provided which is set to an oscillation frequency of 1 and operates during a power outage.

→A battery 8 and a battery power switch device 7 are connected to the inverter 16 to supply power during a power outage.

A rectifier 4 connected to the secondary side of a step-down transformer 90 connected to the commercial power source 1 is connected to the battery 8 via a charging current limiting resistor 5.

The connection point between the diode 20 and the capacitor 21 is connected to the base of a PNP transistor 17 as a battery power switch device and a resistor 19, and the other end of the resistor 19 is connected to the cathode of the battery 8.

Next, the operation of the actual case shown in FIG. 3 will be explained.

When the battery 8 is connected during a non-power outage, the secondary voltage of the step-down transformer 9 is rectified by the rectifier 4, and the battery 8 is charged via the charging current limiting resistor 5.

A gate signal is applied to the gate of the thyristor 15 via the resistor 16 due to the potential drop caused by the charging current that is pressed to the charging current limiting resistor 5, and when the thyristor 15 is closed, the commercial The voltage of the power supply 1 is applied, the starting element 12 is activated, and the fluorescent lamp 11 is lit.

Of course, an appropriate trigger element may be inserted into the gate of the thyristor 15.

If the battery 8 is disconnected during a non-power outage, there is no charging current and the thyristor 15 opens, so the fluorescent lamp 11 does not light up, indicating an abnormal state.
It is possible to prevent forgetting to connect the battery 8.

When the battery 8 is connected, the fluorescent lamp 11 lights up and there is no need for a return operation, so that the operation is simple, similar to the embodiment shown in FIG.

Capacitor 21 is always charged and transistor 1
Since the base potential of transistor 7 is set as high as the emitter potential, transistor 17 is kept open and inverter 16 does not operate.

However, the diode 22 is a floating charging diode.

When the voltage of the commercial power supply 1 abnormally drops due to a power outage, the charging current decreases and the signal to the gate of the thyristor 15 decreases or disappears, so the thyristor 15 opens.

Since the electric charge of the capacitor 21 is no longer supplied, the base potential of the transistor 17 decreases, the transistor 17 is opened, the inverter 16 operates, and the filament f1 is heated by the voltage induced in the secondary winding, and the winding The fluorescent lamp 11 is lit by the induced voltage a.

However, the starting element 12 is set so as not to operate at the oscillation frequency of the inverter 16, which is higher than the commercial frequency.

Further, since the thyristor 15 is open, the induced voltage in the winding a is prevented from flowing into the AC power source 1, thereby preventing loss due to flowing into the AC power source 1, thereby preventing loss of the tb battery.

FIG. 4 shows a specific circuit configuration diagram of another embodiment of the present invention.

The same parts as in FIG. 1 are given the same numbers.

FIG. 4 shows a combination of a rectifier 16 and a transistor 19 in place of the thyristor 15 as the AC power switch device 3 in FIG.
transistor 19 via diode 18 and resistor 21
The connection point between the resistor 21 and the diode 18 and the emitter of the transistor 19 connected to the anode of the battery 8 are connected via a capacitor 20.

The base of transistor 190 is connected to the cathode of battery 8 via resistor 22 .

Diode 29 is a floating charging diode.

When the battery 8 is connected during non-power outage, the voltage of the potential drop across the charging current limiting resistor 5 is transferred to the capacitor 20, the resistor 21 and the transistor 1 via the diode 18.
9 is applied between the base and the emitter, a base current flows, the transistor 19 is closed, the fluorescent lamp 11 is turned on, and a charge is supplied to the capacitor 20.

When the transistor 19 is closed, the fluorescent lamp 11 is turned on.

When the battery 8 is not connected, no charging current flows, so the transistor 19 is opened and the fluorescent lamp 11
The light turns off to warn you, and then connect the battery 8 as shown in Figure 4.
The same is true for .

Due to a power outage, the voltage of the commercial power supply voltage 1 decreases, the charging current decreases, and the transistor 19 is opened, thereby preventing the output of the inverter 17, which is then activated, from flowing into the AC power supply 1.

At this time, a reverse bias is applied between the base and emitter of the transistor 19 by the battery 8 via the resistor 22.
The breakdown voltage of transistor 19 can be increased.

A high voltage is applied between the emitter and collector of the open transistor 19 due to the operation of the inverter 17, but in order to reduce this voltage, the capacitor 28 is connected to the rectifier 16.
can be connected in parallel between the AC terminals of the

This is because the impedance is lowered by connecting the capacitor 28 between the AC terminals of the rectifier 16, and the voltage is also applied to the stabilizer 10.

As is clear from the embodiments shown in FIGS. 3 and 4, in the case of a so-called non-contact switching circuit, a warning of forgetting to connect a battery can be issued without requiring an increase in the number of parts, and its effectiveness is great.

As detailed above, in emergency lighting equipment equipped with a commercial power source and a battery power source that operates during a power outage, a switch device is provided between the commercial power source and the light source, and the control is controlled by the charging current of the charging current limiting resistor. If the battery is disconnected, the circuit is opened and the light source is turned off, making it easy to indicate that the battery is disconnected outside the device, preventing people from forgetting to connect the battery, and reducing the commercial power supply voltage due to a power outage. The present invention provides an emergency lighting device that opens a switch circuit in the event of a fall, reducing loss of battery power.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the present invention, and FIGS. 2 to 4 are circuit diagrams of emergency light lighting devices showing different embodiments of the present invention. 1... commercial power supply, 2... light source (and its lighting device), 3... switching device for alternating current power supply. 4... Rectifier, 5... Charging current limiting resistor, 6... Commercial power supply voltage detection device, 7...
...Battery power switch device, 8...Battery, 9
・・・・・・Step-down transformer.

Claims (1)

[Claims] 1. In an emergency light lighting device equipped with an AC power source and a storage battery power source that operates during a power outage, a switching device controlled by a potential drop due to the charging current in a charging current limiting resistor is provided between the commercial power source and the light source. An emergency light lighting device configured to close a switch device when a potential drop is lower than a predetermined value. 2. In the above-mentioned emergency light lighting device, in a circuit that uses an SCR via a triac or diode bridge as a switching device for AC power, charging current is controlled via a gate trigger element (SBS, Zener diode, etc.). 2. The emergency light lighting device according to claim 1, wherein power is supplied from a potential drop across a resistor. 3. In the above-mentioned emergency light lighting device, in a circuit that uses an AC power switch device and a circuit in which the collector and emitter of a transistor are connected to the DC output terminal of a full-wave rectifier, there is no connection between the AC input terminals of the full-wave rectifier. 2. The emergency light lighting device according to claim 1, wherein capacitors are connected in parallel, the base of the NPN transistor is connected to the cathode of the battery via a resistor, and the emitter is connected to the anode of the battery.