JPS6051798B2 - Emergency lighting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an emergency lighting device that includes a commercial lighting circuit that lights a fluorescent lamp using a commercial power supply and a power failure lighting circuit that lights the fluorescent lamp using a storage battery power source during a power outage.

This type of device needs to be maintained and managed so that the storage battery always has performance above a predetermined level so that it can operate reliably in the event of a failure of the commercial power supply due to an unexpected disaster.

Particularly in the case of storage batteries, unlike fluorescent lamps whose lifespan can be predicted to a certain extent, the lifespan of storage batteries varies significantly depending on the form of the lighting device, the environment of the installation location, the charging and discharging conditions of the storage battery, and the like. For this reason, regular inspections of lighting equipment are required. Since this inspection involves artificially creating a power outage state for a predetermined period of time and visually detecting the lighting state of the fluorescent lamp by the storage battery before the end of the predetermined period of time, there is a drawback that the results vary depending on the inspector. Furthermore, when performing a more detailed inspection, the storage battery voltage is detected after the predetermined time has elapsed, but this has the disadvantage that each lighting device must be inspected individually, which increases the time required for inspection. In order to solve these problems, it is possible to detect whether or not the storage battery voltage discharges and decreases to a predetermined value or less during the predetermined time period, and to continuously display the information using an indicator light such as a light emitting diode even after the predetermined time period has elapsed. However, since the light intensity of the indicator light is small, it is necessary for the inspector to go to the installation location of each lighting device to check, which becomes a great effort when a large number of lighting devices are installed. The present invention has been invented in view of the above points, and one embodiment of the present invention will be described below with reference to FIG.

F is a fluorescent lamp, and its filaments f, f2 are connected to a commercial power source E via a commercial lighting circuit 1 and to a storage battery B via a power failure lighting circuit 2.

The commercial lighting circuit 1 includes a normally closed contact NC) of a first relay switch 5 inserted in series between one end of each of the filaments f, f2 and a commercial power source E, a switch circuit 3, and a filament fl , a glow G and a second relay switch s inserted between the other ends of f2.

The switch circuit 3 is composed of a relay switch S. Also, power outage lighting circuit 2
is the inverter circuit 4 connected to the storage battery B via the normally open contact No. of the third relay switch 53, and the oscillation transformer T.
A circuit 5 connects the output coil L of the output coil L between the filaments Fl and f2 via the ballast capacitor C1 and the normally open contact NO of the second relay switch S2, and connects the first filament preheating coil L2 to the filament f1 via the filter capacitor C2. Circuit 6 connected to and the second filament preheating coil! The circuit 7 is connected to the filament F2 via the filter capacitor C3 and the normally open contacts NO and NO of the first and second relay switches Sl and S2.

The first to third relay switches S1 to S3 are controlled by a power failure detection relay RYl, which is connected to a commercial power source E via a check switch S4 that creates a power failure state. Reference numeral 8 denotes a charging circuit for the storage battery B, which is composed of a step-down transformer T2, diodes Dl, Dl, and a current reducing resistor R1.

Next, 9 detects the terminal voltage of storage battery B and switches the switch circuit 3
The detection control circuit is composed of a relay RY2.

As shown in FIG. 2, this relay has a so-called hysteresis characteristic in which it starts operating at a predetermined high voltage V1 or higher and stops operating when the applied voltage drops to a predetermined low voltage V1. In the above configuration, the terminal voltage of storage battery B under normal conditions is as shown in Figure 3.

Since it is higher than the predetermined high voltage V2 mentioned above, relay RY
2, the relay switch S of the switch circuit 3 is closed. At this time, storage battery B is being charged by commercial power supply E, and power failure detection relay RYl is energized to
- Since the third relay switches S1 to S3 each close their normally closed contacts NC, the fluorescent lamp F is lit by the commercial lighting circuit E. In this state, time T in FIG.

When the inspection switch S4 is opened and maintained in the open state, the first to third relay switches S1 to S3 are respectively switched to the normally open contact NO by demagnetization of the power failure detection relay RYl, and the fluorescent lamp F is switched to the power failure lighting circuit 2. As a result, storage battery B is used as a power source. and lights up. Therefore, the terminal voltage of storage battery B decreases due to discharge, and the best battery is as shown in characteristic A in Figure 3, and the good battery is as shown in the characteristic box in the same figure, during the inspection period (discharge period of the storage battery). The terminal voltage decreases until reaching the end time T2. In these storage batteries. In this case, the terminal voltage at the end of discharge does not reach the predetermined low voltage V1, so the relay coil RY2
The excitation state is maintained, and when the inspection switch S4 is closed at time T2, the fluorescent lamp F is turned on by the commercial power source E via the commercial lighting circuit 1. On the other hand, the defective storage battery is at time T.

The discharge voltage decreases from then to a predetermined low voltage V1 at time t1 until the end of discharge, and the relay coil R
By demagnetizing Y2, the relay switch S of the switch circuit 3 is opened. In this case, even if the check switch S4 is closed at the specified time, the fluorescent lamp F is not connected to the commercial power source E due to the opening of the relay switch S, and the fluorescent lamp F remains in an extinguished state. Time again! After 1t2, the storage battery voltage rises rapidly as shown in Figure 3), but since the charging current is smaller than the discharging current, it takes time to reach the predetermined high voltage V2. At this point in time in FIG. 3, relay switch S is closed by excitation of relay coil RY2, and fluorescent lamp F is turned on. Therefore, between the end of discharge and time T3, the fluorescent lamp F
It is possible to judge whether the storage battery B is good or bad by looking at the lighting state of the battery. Next, FIG. 4 shows another embodiment of the present invention, and to explain the differences from FIG. The rectified and smoothed output of the auxiliary coil L4 of the step-down transformer T2 is applied through the transformer T2.

Further, the detection control circuit 9 has a first circuit connected in series with the light emitting element 0D.
silicon controlled rectifier (hereinafter referred to as SCR-) SCl,
The main elements are a commutating capacitor C4 and second SCR, SC2, and the gate of the first SCR is provided with first and second transistors Ql, Q2 for gate signal bypass, and the base of the second transistor Q2 is provided with a third inverting transistor. Transistor Q3 is connected. Further, voltage-controlled negative resistance elements R2 and R3 having characteristics shown in FIG. 5 are provided at the bases of the first and third transistors Ql and Q3, respectively. V2 in FIG. 5 is the valley point voltage. In the above configuration, the time in Figure 6! ItO
When the inspection switch S4 is opened, the first to third relay switches S1 to S3 are switched in the same manner as described above, and the fluorescent lamp F is turned on by the storage battery power source via the power failure lighting circuit 2.

At this time, assuming that storage battery B is a defective battery and has the discharge characteristics shown in FIG. 6-2, the voltage drops to a predetermined high voltage V2 at time T4. When the voltage falls below this voltage, the resistive element R2 becomes conductive, so the first transistor Q1 becomes conductive, and the first SCR, SC
1 gate signal is bypassed. When the discharge further progresses and reaches a predetermined low voltage V1 at time t1, the resistance element R3 becomes conductive and the second transistor Q2 is cut off, causing the second SCR, SC2
is ignited and conducts.

Therefore, the charge of the commutating capacitor C4 is transferred to the first SCR,
The first SCR, S is discharged as a reverse bias of SC1.
The arc of C1 is extinguished, and the irradiation light from light emitting element 0D disappears.
The impedance of the light-receiving element CT increases, causing the thyristor TR to be cut off. When inspection switch S4 is closed at a later point in time, power failure detection relay RYl is activated.
Since the third relay switches S1 to S3 are switched, lighting of the fluorescent lamp F by the power failure lighting circuit 2 is completed. At this time, the commercial lighting circuit 1 is in a cut-off state due to the cut-off of the thyristor TR, and the fluorescent lamp F is turned off. When the charging circuit 8 starts charging the storage battery B, its terminal voltage rises rapidly, and as soon as it reaches a predetermined low voltage V1, the resistor R3 and the third transistor q are cut off, causing the second transistor Q2 to conduct. Therefore, the gate signal of the second SCR, SC2 is bypassed, but since this SCR uses the storage battery B as its power source, it is still conductive. When the charging progresses further and the terminal voltage of storage battery B reaches a predetermined high voltage V2, resistance element R2 and first transistor Q1 are cut off, so that first SCR and SC1 are ignited and conductive. Therefore, the impedance of the light receiving element CT becomes small due to the irradiation light of the light emitting element 0D, and the impedance of the thyristor TR decreases.
is ignited and conducts, and fluorescent lamp F lights up with commercial power supply E. In this embodiment as well, the quality of the storage battery B can be determined by setting the period T3-T2 as a patrol period in which the lighting state of the fluorescent lamp F is checked. As described above, according to the present invention, when a storage battery is discharged during a regular inspection period in which a power outage is artificially caused, and the terminal voltage of the storage battery drops below a predetermined low voltage during that period, the detection control circuit detects a A switch circuit inserted into the commercial lighting circuit of the light lamp is opened, and the switch circuit is kept open until the terminal voltage of the storage battery reaches a predetermined high voltage by charging after the inspection period, and the commercial lighting circuit lights up. Since we have prevented the lights from turning on and turned off the fluorescent lights, we can more accurately determine the performance of the storage battery compared to the conventional method of visually observing the lighting status of the fluorescent lights before the end of the inspection period. can do.

In addition, since the quality of the storage battery is displayed using a fluorescent light for a certain period of time, the display capacity is large and the judgment can be made from a distance.This is particularly useful when installing many emergency lighting devices in one building and using a common inspection switch. This feature simplifies the inspection work when both are inspected at the same time.

[Brief explanation of drawings]

FIG. 1 is an electric circuit diagram showing one embodiment of the device of the present invention, and FIG.
Figure 3 is a diagram of the operating characteristics of the relay coil, Figure 3 is the voltage characteristic diagram of the storage battery, Figure 4 is an electric circuit diagram showing another embodiment of the device of the present invention, and Figure 5 is the operation of the voltage-controlled negative resistance element. Characteristic diagram,
FIG. 6 is a voltage characteristic diagram of the storage battery and a current waveform diagram of the circuit components shown in FIG. E...Commercial power supply, F...Fluorescent lamp, 1.
... Commercial lighting circuit, B ... Storage battery, 2.
...Power failure lighting circuit, S4...Inspection switch, 3...Switch circuit, 9...Detection control circuit, V1...Predetermined low voltage, V2・・・・・・
Predetermined high voltage.

Claims (1)

[Claims] 1. A commercial lighting circuit that lights up the fluorescent lamp using a commercial power source, a power outage lighting circuit that uses a storage battery charged by the commercial power source as a power source to turn on the fluorescent lamp in the event of a power outage, an inspection switch that creates a power outage state, and the above-mentioned a detection control circuit that detects terminal voltage of the storage battery and controls a switch circuit inserted in the commercial lighting circuit, and the detection control circuit detects the terminal voltage of the storage battery when the storage battery voltage during the inspection period by the inspection switch is below a predetermined low voltage. An emergency lighting device characterized in that the switching circuit is cut off by detecting the above, and the fluorescent lamp is turned off while the charging voltage of the storage battery reaches a predetermined high voltage after the end of the inspection period.