JPS5850472Y2 - emergency lighting system - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an emergency lighting device that flashes a light source in an emergency.

Fig. 1 shows a conventional emergency lighting system, in which 1 is a commercial AC power supply, 2 is a lighting circuit, 3 is a flashing device, 4 is a fluorescent lamp (light source), 5 is a storage battery, 6 is an emergency lighting circuit, 7 is a blinking control device, in which the voltage of the commercial AC power supply 1 is normally applied to the fluorescent lamp 4 via the lighting circuit 2;
is turned on normally due to the non-operation of the flashing device 3.

In an emergency, for example, when a fire alarm system is activated, a fire signal is applied to the flashing control device 7, the flashing device 3 is activated, and the fluorescent lamp 4 is turned on compared to the normal lighting state as shown in FIG. 2A. Flashes at 100% light output.

Furthermore, in the event of a power outage in the commercial AC power source 1, the blinking control device 3 is controlled by the blinking control device 7, and the emergency lighting circuit 6 is operated to connect the fluorescent lamp 4 to the storage battery 5, as shown in FIG. As shown in Figure 2, during a power outage, the lamp flashes with a light output of 36 lights, which is the same as the light output when normally lit.

There is also an operating mode in which the fluorescent lamp 4 simply flashes during a power outage of the commercial AC power supply 1 without responding to a fire signal from the fire alarm equipment, and the operating state at this time is as shown in Figure 2B. Become.

In this case, only when the commercial AC power supply 1 is out of power, the fluorescent lamp 4 is turned on at 3.
It flashes with a light output of 6.0 and remains lit in the event of a fire.

In this way, the emergency lighting device blinks the fluorescent lamp 4 in response to a power outage of the commercial AC power supply 1 or the occurrence of a fire signal to notify the occurrence of an emergency situation. The light output of t is constant, and the light output when the fluorescent lamp 4 is blinked by the storage battery 5 during a power outage is normally turned on because the capacity of the storage battery 5 is limited and the lamp must be kept on for a relatively long time. For example, it was about 36 yen when the light was on normally.

For this reason, if smoke, etc. occurs due to a fire during a power outage,
The visibility of the emergency lighting device to inform surrounding people of its location and the visibility of its display contents (letters, arrows, etc.) to the surrounding people become extremely poor, and its function as an emergency lighting device is significantly reduced.

Furthermore, if the light output of the fluorescent lamp 4 that flashes during a power outage is increased so as not to reduce the attractiveness and visibility in an emergency, the capacity of the storage battery 5 will also increase, resulting in an increase in price.

This invention aims to eliminate the above-mentioned drawbacks and provide an emergency lighting device that can reliably provide an emergency indication without increasing the capacity of the storage battery.

This invention will be explained in detail below based on illustrated embodiments.

However, the same or corresponding parts as in FIG. 1 are given the same reference numerals.

In Figure 3, 1 is a commercial AC power supply, 2 is a lighting circuit, and 3
1 is a blinking device, 4 is a fluorescent lamp, 5 is a storage battery, 6 is an emergency lighting circuit, 7 is a blinking control device, and 8 is an output control device, which is the conventional example shown in FIG. 1 except for this output control device 8. is the same as

The output control device 8 is for changing the light output during the lighting period of the blinking operation, and its configuration will be described later.

The emergency lighting circuit 6 is connected to the primary side of the output transformer Tr1 as shown in FIG. Consists of a current limiting element connected to the secondary side, such as a choke coil L,
A storage battery 5 is connected to its input side.

On the other hand, the output control device 8 is configured as shown in FIG.

In Fig. 5, Q□t Q 2 is a transistor, C is a capacitor, AM is an astable multivibrator,
The capacitor C is connected to the storage battery 5 via the transistor Q1, and this charging voltage is connected to the astable multivibrator AM.
The bias voltage will be .

The oscillation frequency of the multivibrator AM increases as the bias voltage increases.

Further, the output terminal of the blinking control device 7 is connected to the base of the transistor Q2, and a rectangular wave having a period T and a zero level time t is applied.

Next, the operation of the emergency lighting device having the above configuration will be explained.

First, when the commercial AC power supply 1 is in a normal state without a power outage, the voltage of the commercial AC power supply 1 is applied to the fluorescent lamp 4 via the lighting circuit 2.

At this time, the flashing device 3 is inactive and the fluorescent lamp 4 is normally lit.

On the other hand, if the commercial AC power supply 1 fails, the fluorescent lamp 4
The voltage of the storage battery 5 is applied through the emergency lighting circuit 6 and the blinking device 3, and the fluorescent lamp 4 enters a blinking operation.

In this case, the blinking control device 7 and the output control device 8 are operating, and the waveform of the light output of the fluorescent lamp 4 changes from the initial stage to the final stage during the lighting period t of the blinking operation with the cycle T, as shown in FIG. 6A. In this direction, the light output gradually decreases.

The initial light output becomes a value considerably larger than 36 O when normally lit, and becomes a value of 36 O or less in the latter half.

That is, when the commercial AC power supply 1 has a power outage, the voltage of the storage battery 5 is applied to the emergency lighting circuit 6, the blinking control device 7, and the output control device 8, and the blinking control device 7 receives a rectangular wave with a period T and a pulse width Tt. occurs.

This square wave is applied to the base of transistor Q2 of output control device 8.

When a square wave is applied to the base of transistor Q2, time t
During this time, transistor Q2 is turned off, and during this time, capacitor C is charged by storage battery 5 and its voltage gradually increases.

As the charging voltage of the capacitor C, that is, the bias voltage of the astable multivibrator AM increases, its oscillation frequency gradually increases as shown as the frequency in FIG. 7A.

The output of this multivibrator AM is the emergency lighting circuit 6
When applied to the base of transistor Q, transistor Q turns on and off according to its oscillation frequency, and output voltage T
An alternating current output is generated at r.

This AC output is passed through a choke coil and applied to the fluorescent lamp 4 via the blinking device 3, thereby causing the fluorescent lamp 4 to blink.

In this case, the lamp current flowing through the fluorescent lamp 4 during the lighting period of the blinking operation is limited by the choke coil L, and the limiting value also changes as the frequency changes.

That is, as shown as the lamp current in FIG. 7A, the lamp current takes a large value when the frequency is low, and becomes a small value as the frequency becomes high.

Due to this decreasing change in lamp current, the light output of the fluorescent lamp 4 decreases within the same lighting period as shown as the light output in FIG. 7A, and becomes similar to the waveform in FIG. 6A.

If a flash of light with a large optical output is obtained at the beginning of the lighting period of the blinking operation, even if the commercial AC power supply 1 goes out and smoke is generated due to a fire, it is possible to locate it by blinking the fluorescent lamp 4. Since this becomes clear, its attractiveness is enhanced.

Moreover, since the average value of the light output during the lighting period t is about 36% of the normal lighting, the same capacity of the storage battery 5 as the conventional one is sufficient.

In the above embodiment, as shown in FIG. 6A, the light output of the fluorescent lamp 4 was changed in a gradually decreasing manner, but as shown in FIG. It is also possible to make a so-called stepwise change in which the light output exceeds 36 yen and then rapidly decreases to a light output much smaller than 36 yen.

FIG. 8 shows the configuration of an output control device 8 that realizes the above-mentioned stepwise change in optical output. In place of the variable voltage generation means by charging and discharging the capacitor C in FIG. 5, a trigger circuit Tg and a monostable multi-channel Using the vibrator MM, the output of the blinking control device 7 is applied to the trigger circuit Tg, and the output of the monostable multivibrator MM controls the on/off of the transistor Q2 to set the oscillation frequency of the astable multivibrator AM to two levels. It is configured so that it can be switched.

When using the output control device 8 having such a configuration, the output of the blinking control device 7 is applied to the trigger circuit Tg of the output control device 8 during a power outage, and the monostable multivibrator MM is operated by the trigger output. The period during which transistor Q2 is set by (monostable multivibrator MM
is turned on for a period of time corresponding to the output pulse width of

During the period when transistor Q2 is on, the bias voltage of astable multivibrator AM becomes low, and its oscillation frequency also becomes low.

When the transistor Q2 is turned off, the bias voltage becomes high and the oscillation frequency of the astable multivibrator AM also becomes high (the frequency shown in FIG. 7B).

The output of the astable multivibrator AM, which changes between high and low frequencies in this way, is applied to the emergency lighting circuit 6,
This produces an AC output in the same manner as described above.

When this output is applied to the fluorescent lamp 4 via the choke coil L1 blinking device 3, the lamp current changes due to the current limiting action of the choke coil L (lamp current shown in FIG. 7B), and as a result, the fluorescent lamp 4 lights up. The output changes as shown as the optical output in FIG. 7B, that is, as shown in FIG. 6B, only at the initial stage, the output becomes large and becomes small at other times.

The fluorescent lamp 4, which blinks when the light output changes as described above, appears to emit light with a large light output in the initial stage of lighting, so even if the commercial AC power supply 1 goes out and smoke is generated due to a fire, it can be used as an emergency lamp. The location of the lighting device becomes clear and the visibility improves.

Furthermore, even if the light output at the beginning of the lighting period is increased, if the average value during the lighting period is kept at the same level as the conventional one, there is no need to use a storage battery 5 with a larger capacity than the conventional one, and the eye appeal is maintained at the same level as the conventional one. In the case of a small amount, the capacity of the storage battery 5 can be reduced.

In each of the above embodiments, the light output is increased at the beginning of the lighting period of the flashing fluorescent lamp 40 to increase the attractiveness of the emergency lighting device, but the light output is increased at the beginning of the lighting period of the flashing operation. It is not limited to, but may be in the middle or final stage.

Furthermore, in the above embodiment, the case where the fluorescent lamp 4 is blinked using the storage battery 5 as a power source has been explained, but when the commercial AC power supply 1 is used as the power source of the fluorescent lamp 4, and the fluorescent lamp 4 is blinked by a fire signal from a fire alarm equipment. It can also be implemented in the same way to improve the eye-attractiveness.

As described above, this invention makes it possible to clarify the blinking display as a guiding function, that is, to improve its attractivity, without increasing the capacity of the storage battery that serves as an emergency power source in the event of a power outage in the commercial AC power supply. It can contribute to accurate evacuation guidance when a disaster occurs.

Furthermore, if the conspicuousness is kept at the same level as the conventional one, there is an advantage that the capacity of the storage battery can be reduced.

[Brief explanation of drawings]

Fig. 1 is a block circuit diagram showing an example of a conventional emergency lighting device, Fig. 2 A and B are explanatory diagrams of the operation of the conventional device, and Fig. 3 is a block diagram showing an embodiment of the emergency lighting device according to this invention. Circuit diagram, Fig. 4 is a circuit diagram of the emergency lighting circuit of the same embodiment, Fig. 5 is a circuit diagram of the output control device of the same embodiment, Fig. 6A
, B and FIGS. 7A and 7B are operation explanatory diagrams, and FIG. 8 is a circuit diagram showing another configuration example of the output control device. 1... Commercial AC power supply, 2... Lighting circuit, 3... Flashing device, 4... Fluorescent lamp, 5... Storage battery, 6... Emergency lighting circuit, 7... Flashing control device, 8... Output control device. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A fluorescent lamp 4 connected to a commercial AC power source 1 via a lighting circuit 2; a device for connecting the fluorescent lamp 4 to a storage battery 5 via an emergency lighting circuit 6 in the event of a power outage of the commercial AC power source 1; A device that causes the fluorescent lamp 4 to blink during a power outage of the power source 1 or when an abnormality detector such as a fire detector operates; An emergency lighting device characterized by comprising an output control device 8 that changes light output.