JPH0317571Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an emergency lighting device that includes a built-in emergency power source for lighting emergency lighting during a power outage.

[Prior art]

In general, in the event of a power outage such as a fire or earthquake, emergency power or standby power is activated immediately to turn on emergency lighting to prevent secondary disasters. The Fire Service Act stipulates that emergency lighting devices such as these must be installed.

Conventionally, such emergency lighting lighting devices include:
A device having a configuration as shown in FIG. 1 is known.
That is, 1 is a commercial power source, and a non-voltage relay 3 for power failure detection and the primary side of a charging transformer 4 are connected to the power source 1 via a check switch 2 having a normally closed contact. 5a and 5b are diodes constituting a center point tap type full-wave rectifier circuit 5 connected to the secondary side of the charging transformer 4, and the output terminal of the rectifier circuit 5 is connected to the storage battery via a charging current limiting resistor 6. 7
is connected. An emergency lighting lamp 8 such as an incandescent lamp is connected in parallel to the storage battery 7 via the normally closed contact 3a of the power failure detection relay 3.

Under normal conditions, the storage battery 7 is constantly charged by the rectifier circuit 5 via the charging resistor 6, and the power failure detection relay 3 is in an energized operating state and its relay contact 3a is open. As a result, the emergency lighting lamp 8 is in a non-lit state.
On the other hand, in the event of an emergency disaster, etc., if the power supply 1 is out of power, the power outage detection relay 3 is de-energized, its relay contact 3a is closed, and the emergency lighting lamp 8 stops receiving power from the storage battery 7. It is now being received and lit.

However, in the emergency lighting device configured in this way, there may be a problem with the charging circuit, such as a poor connection to the power supply circuit, or a disconnection in the circuit, or a problem with the lighting circuit, such as a disconnection in the lighting itself, or the lighting Since the emergency lighting is configured so that it does not turn on under normal conditions, it is difficult to constantly check for deficiencies in the charging circuit or lighting circuit, However, there was a problem in that there was no sufficient guarantee that the emergency lighting lights would be turned on in an emergency.

In order to solve this problem, an emergency lighting device having a configuration as shown in FIG. 2 has been proposed.
In FIG. 2, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and the explanation thereof will be omitted. This improved emergency lighting device is
A series circuit of a protection resistor 9 and a light-emitting display element 10 such as an LED is connected in parallel to a charging current limiting resistor 6, and when the storage battery 7 is being charged normally, no light is emitted. The display element 10 is turned on, and if there is a defect in the charging circuit and charging is not being performed, the light-emitting display element 10 is turned off to indicate an abnormal state of the charging circuit.

However, in devices equipped with a means to display abnormal conditions in the charging circuit, although it is possible to confirm the normal operation of the charging circuit or an abnormality, it is not possible to indicate a defect in the lighting circuit, such as a disconnection in the lighting itself. There is a problem in that it cannot be confirmed.

[Purpose of invention]

The present invention was developed to solve the above-mentioned problems with conventional emergency lighting devices, and with a simple circuit configuration, it is possible to simultaneously indicate deficiencies in the lighting circuit as well as the charging circuit. The object of the present invention is to provide an emergency lighting device.

[Summary of the idea]

In the present invention, a circuit in which a charging resistor, an emergency lighting lamp, and a storage battery are connected in series is connected to the output end of a rectifier circuit, and a light emitting display element is connected in parallel to the charging resistor via a protective resistor. A normally closed contact of a power failure detection relay connected to an AC power source is connected across the emergency lighting lamp and the storage battery, so that an abnormal state of the charging circuit and the lighting circuit can be detected based on the light emitting state of the light emitting display element. It is meant to be.

〔Example〕

Examples of the present invention will be described below. Third
The figure is a circuit diagram showing an embodiment of the emergency lighting lighting device of the present invention.

In the figure, reference numeral 11 denotes a commercial power supply, and a non-voltage relay 13 for power failure detection and a charging transformer 1
The transformer 14 is connected to its primary side, and a full-wave rectifier circuit 15 consisting of diodes 15a and 15b is connected to the secondary side of the transformer 14, similar to the conventional one. In the present invention, the output terminal of the rectifier circuit 15 is connected to a series connection circuit of a charging resistor 16, an emergency lighting lamp 18 such as an incandescent lamp, and a storage battery 17. A light emitting display element 20 such as an LED is connected in parallel to the charging resistor 16 via a protective resistor 19, and the normally closed relay contact 13a of the power failure detection relay 13 is connected to the emergency lighting 18 and the storage battery 1.
It is connected in parallel across 7.

In the emergency lighting device configured as described above, the power failure detection relay 13 is energized and in operation during normal times, so the relay contact 13a is open, and the charging circuit and the lighting circuit are activated. When both are in a normal state, a charging current flows from the rectifier circuit 15 to the storage battery 17 through the charging resistor 16 and the emergency lighting 18, and the storage battery 17 is constantly charged. Then, due to the voltage drop across the charging resistor 16, the light emitting display element 20 connected in parallel to the resistor 16 emits light, indicating that both the charging circuit and the lighting circuit are operating normally.

On the other hand, when the power supply 11 is in a normal state, for some reason, for example, disconnection of the charging circuit, poor connection, etc.
Alternatively, if this occurs due to disconnection of the illumination lamp, poor contact between the illumination lamp and the socket, etc., the charging current will no longer flow, and the light emitting display element 20 will no longer emit light. Thereby, an abnormal state of the charging circuit and/or an abnormal state of the lighting circuit can be displayed.

Therefore, by monitoring the light emitting state of this light emitting display element, it is possible to easily detect an abnormal state of the charging circuit or the lighting circuit. Incidentally, these abnormal conditions can also be confirmed by operating the inspection switch 12, but this confirmation requires operating the inspection switch 12 each time and is complicated, whereas the light-emitting display Status display using elements has the advantage of making it extremely easy to discover abnormal conditions.

Next, if the commercial power supply 11 is out of power due to some cause such as a disaster, the power outage detection relay 13 is deenergized and its relay contact 13a is closed, so the storage battery 17, emergency lighting 18, and relay contact 13a
A closed circuit is formed, and the voltage of the storage battery 17 is applied to the emergency lighting lamp 18, so that the emergency lighting lamp 18 is turned on.

In this emergency lighting device, a small current continuously flows through the charging circuit under normal conditions, but the charging current is equal to or less than the rated lamp current of the lighting lamp.
For example, it is about 1/20, and therefore even if this charging current flows through the lighting lamp 18, it will not affect the life of the lighting lamp. In addition, since the above-mentioned charging current for charging the storage battery is constantly flowing through the emergency lighting, the filament, etc. is in a preheated state, so the emergency lighting is activated during a power outage of commercial power. When the light is turned on, the inrush current is alleviated. Therefore, erroneous disconnection of the storage battery fuse and wear and tear of the relay contacts are prevented.

[Effect of idea]

As explained above based on the embodiments, according to the present invention, by simply changing the connection of the emergency lighting,
It is possible to easily display an abnormality not only in the charging circuit but also in the illumination lamp circuit with a simple configuration without requiring addition or modification of other structural members. Therefore, it is possible to quickly deal with an abnormal state of the emergency illumination lamp lighting device, and it is possible to improve the reliability of the lighting operation in an emergency.

Furthermore, since the emergency lighting lamp is configured so that a charging current always flows through it, when the lighting is turned on in an emergency, inrush current is alleviated, and wear and tear on the relay contacts can be reduced.

[Brief explanation of the drawing]

1 and 2 are circuit diagrams showing a configuration example of a conventional emergency lighting device, and FIG. 3 is a circuit diagram showing an embodiment of the emergency lighting device according to the present invention. . In the figure, 12 is a check switch, 13 is a power failure detection relay, 15 is a rectifier circuit, 16 is a charging resistor, 17 is a storage battery, 18 is an emergency lighting lamp, 19 is a protective resistor, and 20 is a light emitting display element.

Claims (1)

[Scope of utility model registration request] A circuit in which a charging resistor, an emergency lighting lamp, and a storage battery are connected in series is connected to an output end of a rectifier circuit connected to an AC power source, and a light emitting display element is connected in parallel to the charging resistor via a resistor, An emergency lighting device characterized in that a normally closed contact of a power failure detection relay connected to the AC power source is connected in parallel across the emergency lighting and the storage battery.