JPH06113487A - Lighting equipment for emergency - Google Patents

Abstract

PURPOSE:To perform a power feed with the same inverter circuit in either case of the interruption and uninterruption of a commercial AC power supply, by providing a converter circuit for converting the voltage of a battery into the DC voltage having the equal value to the rectified voltage of the commercial AC power supply, and by feeding the power of the battery to the inverter circuit via the converter circuit. CONSTITUTION:When a commercial AC power supply E is interrupted, no current is applied to a relay coil Ry2L, and a converter circuit 14 and an inverter circuit 4 are connected by a relay contact Ry2S1. At the same time, a current-limiting part 12 for the power of a battery B and a discharge lamp FL are connected by a relay contact Ry2S2, and the battery B and the converter circuit 14 are connected by a relay contact Ry2S3. By the converter circuit 14, the voltage of the battery B is converted into the DC voltage having the equal value to the rectified voltage of the commercial AC power supply E. The power having this DC voltage is converted into a high-frequency power by the inverter circuit 4 to light the discharge lamp FL. Thereby, the inverter circuit 4 can be used in either case of the interruption and uninterruption of the commercial AC power supply E.

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 for lighting a lamp with a commercial AC power supply when the commercial AC power supply is not in power failure and with a battery output when there is a power failure.

[0002]

2. Description of the Related Art As a conventional emergency lighting device of this type, one having a structure shown in FIG. 2 is known.

In the emergency lighting device shown in FIG. 2, a commercial AC power source E is connected to a normal lighting circuit 1 and an emergency lighting circuit 2, and these normal lighting circuit 1 and emergency lighting circuit 2 are connected. Are relay contacts Ry1S1, Ry1S2, Ry1S3,
The discharge lamp FL is connected via Ry1S4, and either one of them is connected to the discharge lamp FL.

In the normal lighting circuit 1, a rectifier circuit 3 is connected to a commercial AC power source E, and an inverter circuit 4 for high frequency conversion is connected to the rectifier circuit 3. The inverter circuit 4 has relay contacts Ry1S1, It is connected to the discharge lamp FL via Ry1S2, Ry1S3, and Ry1S4.

On the other hand, in the emergency lighting circuit 2, a relay coil Ry1L for controlling the relay contacts Ry1S1, Ry1S2, Ry1S3, Ry1S4 is connected between the commercial AC power sources E, and the rectifier circuit 5 and the charging are connected to the relay coil Ry1L. The circuits 6 are connected in cascade.

The charging circuit 6 is also connected to a battery B and an inverter circuit 8 via a switching circuit 7, and the inverter circuit 8 has relay contacts Ry1S1, Ry1S2, Ry1S.
3, connected to the discharge lamp FL via Ry1S4.

[0007] When the commercial AC power source E is out of power,
That is, when there is an output from the commercial AC power supply E, it is conducted to the relay coil Ry1L, and the relay contacts Ry1S1, Ry1S2, Ry1S
3, Ry1S4 is switched to the normal lighting circuit 1 side, the AC power of the commercial AC power source E is rectified by the rectifier circuit 3, converted into a high frequency by the inverter circuit 4, and the discharge lamp FL is lit. On the other hand, at this time, the switching circuit 7 is switched to the battery B side, the transformer Tr1 steps down the voltage, and the rectifying circuit 3 performs full-wave rectification.
The battery B is charged by the charging circuit 6.

When the commercial AC power source E fails, no current flows through the relay coil Ry1L, and the relay contacts Ry1S1, Ry1S
2. Switch Ry1S3 and Ry1S4 to the emergency lighting circuit 2 side. Then, the switching circuit 7 is switched to the side of the inverter circuit 8, the charge charged in the battery B is converted into a high frequency by the inverter circuit 8, and the discharge lamp FL is turned on.

[0009]

However, in the case of the conventional example shown in FIG. 2, the cost is high because the conventional lighting circuit 1 and the emergency lighting circuit 2 have two units. There is a problem that the size of the apparatus becomes large and the arrangement is complicated and complicated.

Further, when the two inverter circuits 4 and 8 are switched, a discharge lamp is provided so that high frequency waves do not wrap around.
Relay contacts Ry1S1, Ry1S2, Ry1S3 to all terminals of FL
, Ry1S4 must be provided, which further complicates the circuit configuration.

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 which is downsized and at a reduced cost.

[0012]

According to the present invention, when the commercial AC power supply is not interrupted, the power is converted from the commercial AC power supply by an inverter circuit and supplied to a lamp, and the battery is charged by a charging circuit. In an emergency lighting device that supplies power from the battery during a power failure of the AC power supply, a converter circuit that converts the voltage of the battery into a voltage of the commercial AC power supply, and the inverter circuit that detects a power failure of the commercial AC power supply. A switching circuit for switching between the converter circuit and the commercial AC power source,
The power of the battery is supplied to the inverter circuit via the converter circuit.

[0013]

The present invention provides a converter circuit for converting the voltage of the battery into the voltage of the commercial AC power source, and supplies the electric power of the battery to the inverter circuit via this converter circuit. Since the switching circuit is provided on the input side of the inverter circuit, a high frequency does not flow in the switching circuit, so that the switching circuit can be simplified.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an emergency lighting device of the present invention will be described below with reference to the drawings. It should be noted that parts corresponding to the configuration described in the conventional example shown in FIG.

In the emergency lighting device shown in FIG. 1, a rectifying circuit 3 for rectification is connected to a commercial AC power source E.
The relay contact of the relay Ry2 as a switching circuit on the output side of
The inverter circuit 4 is connected via Ry2S1.

In the inverter circuit 4, either the current limiting section 11 for the power of the commercial AC power source E or the current limiting section 12 for the power of the battery B is selectively switched by the relay contact Ry2S2 of the relay Ry2. Is connected to the discharge lamp FL. It should be noted that the brightness of the discharge lamp FL when using the current limiting section 12 for the power of the battery B is higher than that when using the current limiting section 11 for the power of the commercial AC power source E to save the power of the battery B. Is set to be dark.

On the other hand, the relay coil Ry2L of the relay Ry2 is connected between the commercial AC power sources E, and the primary winding Tr1a of the step-down transformer Tr1 is connected to the relay coil Ry2L.
The rectifier circuit 5 and the charging circuit 6 are connected in series to the secondary winding Tr1b of the transformer Tr1.

The charging circuit 6 is connected to the battery B and a converter circuit 14 such as a step-up chopper circuit via a relay contact Ry2S3 of the relay Ry2, and the converter circuit 14 is connected to a relay contact Ry2S1. . The converter circuit 14 converts the voltage of the battery B of about 3 to 12V into the voltage of the commercial AC power source E of about 100 to 200V.

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

First, when the commercial AC power source E is not in a power failure, that is, when the commercial AC power source E has an output, current is supplied to the relay coil Ry2L, and the relay contact Ry2S1 connects the rectifier circuit 3 and the inverter circuit 4 to each other. Contact Ry2S
2 connects the current limiting section 11 for electric power of the commercial AC power source E and the discharge lamp FL, and the relay contact Ry2S3 is connected to the charging circuit 6
And battery B are connected.

Then, the power of the commercial AC power source E is rectified by the rectifier circuit 3 and converted into a high frequency by the inverter circuit 4 to light the discharge lamp FL.

Further, the voltage of the commercial AC power source E is set to the transformer Tr.
The voltage is reduced by 1 and rectified by the rectifier circuit 5, and the battery B is charged by the charging circuit 6.

On the other hand, during a power failure of the commercial AC power supply E, no current is supplied to the relay coil Ry2L, the relay contact Ry2S1 connects the converter circuit 14 and the inverter circuit 4, and the relay contact Ry2S2 limits the current for battery B power. The part 12 and the discharge lamp FL are connected, and the relay contact Ry2S3 further connects the battery B and the converter circuit 14.

Then, the electric power of the battery B is converted into the voltage of the commercial AC power source E rectified by the converter circuit 14 and converted into the high frequency by the inverter circuit 4 to light the discharge lamp FL. In this case, since the current limiting unit 12 for the power of the battery B is used, the brightness of the discharge lamp FL becomes lower than when the power of the commercial AC power source E is used, and the life of one charge of the battery B is maintained longer. I have to.

According to the above-mentioned embodiment, since the inverter circuit 4 is used both when the commercial AC power source E is out of power and when there is no power outage, only one unit is required and the unit can be integrated. The wiring of the circuit can be simplified, and the number of steps can be reduced and the cost can be reduced. Further, by integrating the units, it is possible to prevent erroneous wiring. Furthermore, by integrating and miniaturizing the unit, the degree of freedom in designing the instrument and the variation can be expanded, and the quality can be improved.

[0026]

According to the emergency lighting device of the present invention, since the converter circuit for converting the voltage of the battery into the voltage of the commercial AC power source is provided and the power of the battery is supplied to the inverter circuit through the converter circuit, Since only one inverter circuit can be used during non-power failure, the device can be simplified, and since the switching circuit is provided on the input side of the inverter circuit, high frequency does not flow in the switching circuit. Can also be easy.

[Brief description of 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 a conventional emergency lighting device.

[Explanation of symbols]

 4 Inverter circuit 6 Charging circuit B Battery E Commercial AC power supply FL Discharge lamp Ry2 Relay as switching circuit

Claims (1)

[Claims] 1. When the commercial AC power supply is not interrupted, power is converted from the commercial AC power supply by an inverter circuit and supplied to a lamp, and a battery is charged by a charging circuit. In the emergency lighting device for supplying the electric power of 1., a converter circuit for converting the voltage of the battery into the voltage of the commercial AC power supply, and detecting the power failure of the commercial AC power supply for the converter circuit and the inverter circuit. An emergency lighting device comprising: a switching circuit for switching a commercial AC power source; and supplying power of the battery to the inverter circuit via the converter circuit.