JPH09129378A - Emergency lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the mounting operation of an emergency lighting device by arranging a control circuit for supplying DC current from a battery to an inverter circuit in the interruption of service of an AC power source after the connection to the AC power source is detected. SOLUTION: In the assembled state containing the mounting of a battery B, a light emitting diode LED 11 is not emitted, and the discharge current of the battery B is obstructed with a photo-thyrister PQ1. Even if a commercial AC power source is not connected and judged as interruption of service, current is not supplied to an inverter circuit 3 from the battery B, and a discharge lamp FL is not carelessly lit. When the AC power source E is connected, the LED 11 is emitted, the photo-thyrister PQ1 is turned on, and the battery B is charged. After that, when the AC power source E interrupts service, the battery B is connected to the inverter circuit 3, and the discharge lamp FL is lit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency lighting device that performs switching operation according to a power failure and a non-power failure of an AC power source.

[0002]

2. Description of the Related Art As a conventional emergency lighting device, for example, a structure shown in FIG. 3 is known. In the emergency lighting device having the configuration shown in FIG. 3, the input terminal of the ballast 1 is connected to the commercial AC power source E, and the output terminal of the ballast 1 is connected to one filament FL1 of the fluorescent lamp FL. At the same time, it is connected to the other filament FL2 via the relay contact RyS1 and the relay contact RyS2.

The commercial AC power source E has a relay coil Ry.
L is connected, the constant voltage element Z1 and the primary winding Tr11 of the transformer Tr1 are connected in parallel to the relay coil RyL, and the full-wave rectifier 2 is connected to the secondary winding Tr12 of the transformer Tr1.
The input terminal of is connected.

Further, between the output terminals of the full-wave rectifier 2,
A smoothing capacitor C1 is connected, and a series circuit of a resistor R1, a diode D1, a fuse F and a battery B is connected between both terminals of this capacitor C1.

Between both terminals of the battery B via the fuse F, a push-pull type inverter circuit 3 is connected via a relay contact RyS3. This inverter circuit 3 is an inverter transformer via the choke coil L1.
It is connected to the middle point of the input winding Tr21 of Tr2.
One end of 21 is connected to the negative pole of the full-wave rectifier 2 via the emitter and collector of the transistor Q1, and the other end of the input winding Tr21 is connected to the negative pole of the full-wave rectifier 2 via the emitter and collector of the transistor Q2. There is. A capacitor C2 and a bidirectional constant voltage element Z2 are connected in parallel to the input winding Tr21. Further, the inverter transformer Tr2 has a control winding Tr23, and one end of this control winding Tr23 is
The other end of the base of the transistor Q1 is connected to the base of the transistor Q2, the base of the transistor Q1 is connected via the resistor R2, the base of the transistor Q2 is connected via the resistor R3, and the series connection of the relay contact RyS3 and the choke coil L1 is connected. Connected to a point.

The output winding Tr22 of the inverter transformer Tr2 is connected to the filament FL1 of the fluorescent lamp FL, and is also connected to the filament FL2 of the fluorescent lamp FL via the capacitor C3 and the relay contact RyS1.

The inverter transformer Tr2 has a filament preheating winding Tr24 and a filament preheating winding Tr25. The filament preheating winding Tr24 is an output winding Tr.
22 and the filament FL1 via the current limiting capacitor C4,
25 is connected to the filament FL2 via the current limiting capacitor C5, the relay contact RyS1 and the relay contact RyS2.

When the commercial AC power source E is not shut down,
Since current is flowing through the relay coil RyL, each relay contact RyS1, RyS2 is connected to the ballast 1.
Therefore, the voltage of the commercial AC power source E is applied between the filaments FL1 and FL2 of the fluorescent lamp FL via the ballast 1 to start and light the fluorescent lamp FL.

On the other hand, the voltage is reduced by the transformer Tr1, full-wave rectified by the full-wave rectifier 2, smoothed by the capacitor C1, and the battery B is charged through the resistor R1 and the diode D1.

Since the relay contact RyS3 is open, no power is supplied to the inverter circuit 3 and it does not operate.

When the commercial AC power source E fails, no current flows in the relay coil RyL, and the relay contacts RyS1,
RyS2 is connected to the inverter circuit 3 side.

Then, the DC power of the battery B is supplied to the inverter circuit 3, and the inverter circuit 3 oscillates at a high frequency to induce a high frequency AC at the output winding Tr22, and the fluorescent lamp FL.
Is turned on at high frequency. Also, filament preheating winding Tr2
A voltage is also induced in 4 and Tr25, and the current value is made almost constant by capacitors C3, C4, and C5 to preheat filaments FL1 and FL2. The output from the inverter circuit 3 is lower than the output from the ballast 1.

[0013]

However, in the case of the configuration shown in FIG. 3 described above, in a state where the battery B is connected and the commercial AC power source E is not connected, for example, during transportation,
Since the voltage of the commercial AC power supply E is not applied, no current flows in the relay coil RyL, and the relay contacts RyS1 and RyS2
Is connected to the inverter circuit 3 side, and the fluorescent lamp FL is turned on by using the battery B as a power source.

For this reason, the battery B is removed in a state such as transportation until the commercial AC power source E is connected,
The battery B must be connected at the time of mounting, and there is a problem that the mounting work is complicated.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an emergency lighting device that can be easily mounted.

[0016]

An emergency lighting device according to claim 1 supplies electric power from this AC power supply and charges a battery with the AC power supply when the AC power supply is not in power failure, In the event of a power failure, the AC power supply is switched to the battery, the DC from this battery is converted by an inverter circuit and supplied, and in an emergency lighting device that lights a discharge lamp, it is detected that it has been connected to the AC power supply. It is provided with a control circuit that supplies direct current from the battery to the inverter circuit at the time of a power failure of the AC power supply after being connected to the power supply, and the battery at the time of the power failure of the AC power supply after detecting the connection to the AC power supply. Since the direct current from the battery is supplied to the inverter circuit, the battery and the inverter circuit are not connected before the AC power source is connected. Oke connect the battery is not connected to a power source, it is not necessary to connect the battery when worn, mounting operation is simplified.

An emergency lighting device according to a second aspect is the emergency lighting device according to the first aspect, wherein the control circuit has a charging means charged by an AC power source and a voltage of the charging means is a predetermined value or more. And a switching means for electrically connecting the battery and the inverter circuit, wherein the charging means is charged by connecting to an AC power source, and the AC power source after detecting that the AC power source is connected Since the DC circuit from the battery is supplied to the inverter circuit at the time of power failure, the battery and the inverter circuit are not connected before the AC power source is connected.Therefore, you can connect the battery without connecting to the AC power source, Eliminating the need to connect a battery simplifies the mounting operation.

An emergency lighting device according to a third aspect is the emergency lighting device according to the first aspect, wherein the control circuit includes a charging means charged by an AC power source and a voltage detecting means for detecting the voltage of the charging means. A rectifying means arranged in the charging path of the battery for flowing only a current in the charging direction of the battery; and a rectifying means connected in parallel to the rectifying means for flowing only a current in the discharging direction of the battery to charge the battery by the voltage detecting means. And a switching means for electrically connecting the battery and the inverter circuit when it is determined that the voltage of the means is equal to or higher than a predetermined value, and the charging means is charged by connecting to the AC power source and the AC power source. When the AC power supply fails after detecting that the AC power supply has been connected, DC is supplied from the battery to the inverter circuit. Does not connect the Li and the inverter circuit, Oke connect the battery when it is not connected to an AC power source, it is not necessary to connect the battery when worn, mounting operation is simplified.

The emergency lighting device according to a fourth aspect is the emergency lighting device according to the first aspect, wherein the control circuit detects charging means charged by an AC power source and a voltage of the charging means. If the voltage of the charging means is equal to or higher than a predetermined value, the voltage detecting means self-holds that the voltage is equal to or higher than the predetermined value; And a switching means for electrically connecting the inverter circuit, and the battery is connected to the AC power supply when the charging means is charged and the AC power supply is detected after the AC power supply is connected. Since the DC is supplied from the inverter circuit to the inverter circuit, the battery is not connected to the inverter circuit before the AC power source is connected. Oke connect the battery, it is not necessary to connect the battery when worn, mounting operation is simplified.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an emergency lighting device of the present invention will be described below with reference to the drawings. The parts corresponding to the conventional example shown in FIG.

The emergency lighting device having the structure shown in FIG.
The input terminal of the ballast 1 is connected to the commercial AC power supply E, and the output terminal of the ballast 1 is connected to one filament FL1 of the fluorescent lamp FL as a discharge lamp,
It is connected to the other filament FL2 via relay contact RyS1 and relay contact RyS2.

The commercial AC power source E has a relay coil Ry.
L is connected, the constant voltage element Z1 and the primary winding Tr11 of the transformer Tr1 are connected in parallel to the relay coil RyL, and the full-wave rectifier 2 is connected to the secondary winding Tr12 of the transformer Tr1.
The input terminal of is connected.

Further, between the output terminals of the full-wave rectifier 2,
A control circuit 11 is connected, and this control circuit 11 is a full-wave rectifier 2
A smoothing capacitor C1 having a function as a charging means is connected between the output terminals of the resistor C1 and a resistor R1
1 and a series circuit of a light emitting diode LED11 as a voltage detecting means are connected in parallel, and a resistor R1, a diode D1, a fuse F, a battery B are provided between the output terminals of the full-wave rectifier 2.
And a series circuit of the diode D11 is connected. The diode D11 is connected so as to have a forward polarity with respect to the discharge current direction of the battery B.
A light-emitting diode LED11 and a photo-thyristor PQ1 which is photo-coupled are connected in anti-parallel with respect to.

Further, a push-pull type inverter circuit 3 is connected via a relay contact RyS3 between both terminals of the battery B via the fuse F, the diode D11 and the photothyristor PQ1. This inverter circuit 3
It is connected to the midpoint of the input winding Tr21 of the inverter transformer Tr2 via the choke coil L1, and one end of this input winding Tr21 is connected to the negative pole of the full-wave rectifier 2 via the emitter and collector of the transistor Q1. The other end of the line Tr21 is connected to the negative electrode of the full-wave rectifier 2 via the emitter and collector of the transistor Q2. Further, a capacitor C2 and a bidirectional constant voltage element Z2 are connected to the input winding Tr21. Furthermore, the inverter transformer Tr2 has a control winding Tr23, and one end of this control winding Tr23 is a transistor
The other end of the base of Q1 is connected to the base of transistor Q2, the base of transistor Q1 is connected via resistor R2, the base of transistor Q2 is connected via resistor R3 to the connection point of relay contact RyS3 and choke coil L1, respectively. Has been done.

The output winding Tr22 of the inverter transformer Tr2 is connected to the filament FL1 of the fluorescent lamp FL, and is also connected to the filament FL2 of the fluorescent lamp FL via the capacitor C3 and the relay contact RyS1.

The inverter transformer Tr2 has a filament preheating winding Tr24 and a filament preheating winding Tr25, and the filament preheating winding Tr24 is an output winding Tr.
22 and the filament FL1 via the current limiting capacitor C4,
25 is connected to the filament FL2 via the current limiting capacitor C5, the relay contact RyS1 and the relay contact RyS2.

Next, the operation of the above embodiment will be described.

First, in the assembled state including the mounting of the battery B, the capacitor C1 is not charged and the light emitting diode LED11 does not light. Therefore, the battery B
Discharge current is blocked by the photothyristor PQ1, and the discharge current does not flow from the battery B. Therefore, the commercial AC power supply E
Even if the power supply is not connected and it is determined that there is a power failure due to the relay coil RyL, no current is supplied from the battery B to the inverter circuit 3, the fluorescent lamp FL does not light, and even if the battery B is mounted after assembly, carelessly. not light.

By mounting the commercial AC power supply E, the voltage of the commercial AC power supply E is stepped down by the transformer Tr1 and rectified by the full-wave rectifier 2 to charge the capacitor C1. Therefore, the light emitting diode LED11 emits light and the photothyristor PQ1 is turned on, so that the discharge path of the battery B is formed. The charging path of the battery B is performed via the diode D11 regardless of the charging of the capacitor C1.

At the time of non-power failure of the commercial AC power source E after the commercial AC power source E is connected, current flows through the relay coil RyL, so that the relay contacts RyS1 and RyS2 are connected to the ballast 1, respectively. There is.

Therefore, the voltage of the commercial AC power source E is applied between the filaments FL1 and FL2 of the fluorescent lamp FL via the ballast 1 to start and light the fluorescent lamp FL.

In addition, the voltage of the commercial AC power source E is set to the transformer Tr.
Step down by 1, full-wave rectifier 2 by full-wave rectification, smooth by capacitor C1, resistor R1 and diode D1 and diode
Battery B is charged via D11.

Since the relay contact RyS3 is opened, the transistor Q2 is turned off, so that the inverter circuit 3 is not supplied with power and does not operate.

On the other hand, when the commercial AC power source E fails, no current flows in the relay coil RyL, and the relay contacts RyS1,
RyS2 is connected to the inverter circuit 3 side, and the relay contact RyS3 is closed to connect the battery B and the inverter circuit 3. Since the capacitor C1 is charged after the commercial AC power source E is connected, the light emitting diode LE
Since D11 emits light and the photothyristor PQ1 is turned on, the discharge path of the battery B is formed.

Then, the DC power of the battery B is supplied to the inverter circuit 3, and the inverter circuit 3 is activated and oscillates at a high frequency to induce a high-frequency alternating current in the output winding Tr22 to light the fluorescent lamp FL at a high frequency. In addition, a voltage is induced in the filament preheating windings Tr24 and Tr25, and capacitors C4 and C5
Keeps the current value almost constant by filaments FL1, FL2
To preheat. The output from the inverter circuit 3 is set lower than the output from the ballast 1.

Next, another embodiment will be described with reference to FIG. The embodiment shown in FIG. 2 is different from the embodiment shown in FIG. 1 in the configuration of the control circuit 11.

This control circuit 11 has a capacitor C1,
A resistor R11, a thyristor Q11 and a capacitor C1
A series circuit of C11 is connected, and the gate of this thyristor Q11 is connected to the positive electrode of the full-wave rectifier 2 via a resistor R12. A parallel circuit of a resistor R13 and a capacitor C12 is connected between the gate and cathode of the thyristor Q11. Further, a triac Q12 is connected between the negative electrodes of the battery B and the full-wave rectifier 2, the gate of the triac Q12 is connected to the cathode of the thyristor Q11, and the resistor R14 is connected in parallel with the capacitor C11. .

In the assembled state including the mounting of the battery B, the capacitor C1 is not charged, the capacitors C11 and C12 are not charged, the gate voltage is not applied to the thyristor Q11, and the thyristor Q11 is not charged. Q11 remains off, no gate voltage is applied to TRIAC Q12, and TRIAC Q12 also remains off. Therefore, the charge / discharge current of the battery B is
Since it is blocked by Q12 and the discharge current does not flow from battery B, the commercial AC power supply E is not connected and the relay coil
Even if the power failure is determined by RyL, no current is supplied from the battery B to the inverter circuit 3, the fluorescent lamp FL does not light, and the battery B is not lighted carelessly even after the assembly.

By mounting the commercial AC power supply E, the voltage of the commercial AC power supply E is stepped down by the transformer Tr1 and rectified by the full-wave rectifier 2 to charge the capacitor C1. Therefore, capacitors C12 and C13
Is charged, the thyristor Q11 is kept on and the gate voltage is applied to the triac Q12, and the triac Q1
2 is turned on, and a charge / discharge path for battery B is formed.

At the time of non-power failure of the commercial AC power source E after the commercial AC power source E is connected, current flows through the relay coil RyL, so that the relay contacts RyS1 and RyS2 are connected to the ballast 1, respectively. There is.

Therefore, the voltage of the commercial AC power source E is applied between the filaments FL1 and FL2 of the fluorescent lamp FL via the ballast 1 to start and light the fluorescent lamp FL.

The basic operation after this is the same as that of the embodiment shown in FIG.

In any of the embodiments, the same effect can be obtained by using an inverter circuit for high frequency oscillation having a rectifying circuit or the like instead of the ballast 1.

[0044]

According to the emergency lighting device of the first aspect, since the direct current from the battery is supplied to the inverter circuit at the time of the power failure of the alternating current power source after detecting the connection to the alternating current power source, the alternating current power source is connected. Prior to this, the battery and the inverter circuit are not connected, so that the battery can be connected in advance without being connected to the AC power supply, the battery need not be connected at the time of mounting, and the mounting operation can be simplified.

According to the emergency lighting device of the second aspect,
In addition to the emergency lighting device according to claim 1, when the charging means is charged by connecting to the AC power supply and the AC power supply is disconnected after detecting that the AC power supply is connected, the DC from the battery is supplied to the inverter circuit. Since the battery is not connected to the inverter circuit before the AC power supply is connected, the battery can be connected in advance without being connected to the AC power supply. Can be simplified.

According to the emergency lighting device of the third aspect,
In addition to the emergency lighting device according to claim 1, when the charging means is charged by connecting to the AC power supply and the AC power supply is disconnected after detecting that the AC power supply is connected, the DC from the battery is supplied to the inverter circuit. Since the battery is not connected to the inverter circuit before the AC power supply is connected, the battery can be connected in advance without being connected to the AC power supply. Can be simplified.

According to the emergency lighting device of the fourth aspect,
In addition to the emergency lighting device according to claim 1, when the charging means is charged by connecting to the AC power supply and the AC power supply is disconnected after detecting that the AC power supply is connected, the DC from the battery is supplied to the inverter circuit. Since the battery is not connected to the inverter circuit before the AC power supply is connected, the battery can be connected in advance without being connected to the AC power supply. Can be simplified.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an embodiment of an emergency lighting device of the present invention.

FIG. 2 is a circuit diagram showing another embodiment of the above emergency lighting device.

FIG. 3 is a circuit diagram showing a conventional emergency lighting device.

[Explanation of symbols]

 3 Inverter circuit 11 Control circuit B Battery C1 Capacitor as charging means D11 Diode as rectifying means E Commercial AC power supply FL Fluorescent lamp as discharge lamp LED11 Light emitting diode as voltage detecting means PQ1 Photothyristor as switching means

Claims (4)

[Claims] 1. When the AC power supply is not in a power failure, power is supplied from the AC power supply and the battery is charged by the AC power supply, and when the AC power supply is in a power failure, the AC power supply is switched to the battery and the DC power is supplied from the battery. Is converted by an inverter circuit and supplied, and in an emergency lighting device for lighting a discharge lamp, it is detected that the AC power supply is connected, and from the battery during a power failure of the AC power supply after being connected to the AC power supply. An emergency lighting device, comprising: a control circuit for supplying the direct current to the inverter circuit. 2. The control circuit comprises: a charging unit that is charged by an AC power source; and a switching unit that electrically connects the battery and the inverter circuit when the voltage of the charging unit is equal to or higher than a predetermined value. The emergency lighting device according to claim 1, which is characterized. 3. The control circuit comprises: charging means charged by an AC power source; voltage detecting means for detecting a voltage of the charging means; and only a current in a charging direction of the battery, which is arranged in a charging path of the battery. Rectifying means for flowing, and only the current in the discharging direction of the battery which is connected in parallel to the rectifying means is caused to flow, and when the voltage detecting means determines that the voltage of the charging means is a predetermined value or more, the battery and the inverter circuit are turned on. The emergency lighting device according to claim 1, further comprising a switching unit that is electrically connected. 4. The control circuit detects charging means to be charged by an AC power source, and detects the voltage of the charging means. When the voltage of the charging means is a predetermined value or more, the control circuit determines that the voltage is the predetermined value or more. And a switching means for electrically connecting the battery and the inverter circuit when the voltage detection means determines that the voltage of the charging means is equal to or higher than a predetermined value. The emergency lighting device according to claim 1.