JPH0157452B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an emergency lighting device.

A conventional emergency lighting device will be explained based on FIGS. 1 to 7. This emergency lighting device
As shown in the figure, the switching signal generation circuit is connected to the commercial power source, the distribution board is connected to the two power lines A ₁ and A ₂ drawn out from the commercial power source, and the output of the switching signal generation circuit is connected to the signal line. Power line supplied to the distribution board through A ₃ and A ₄ and drawn out from the distribution board
Connect the switching circuit to A ₅ and A ₆ , and also connect the power line A ₅
Connect terminal X ₂ , which is the common power input terminal of charging circuit _a and normal lighting circuit _B , of the emergency lighting equipment to , and connect terminal X ₃ , which is the other power input terminal of charging circuit _a , to power line A ₆ . At the same time, terminal X ₁ , which is the other power input terminal of normal lighting circuit _b , is connected to COM− of contact ry ₁ of relay RY ₁ , which responds to the switching circuit.
Connected through NO. In addition, S ₁ is the locking lighting interlocking contact, and the shorting wire L ₁ of the switching signal generation circuit
If you remove it and connect it to that part, you can control the switching signal generation circuit in conjunction with the locking operation or lighting fixture blinking switching operation. In addition, _S2 is an automatic fire alarm equipment transfer contact, and if the shorting line _L2 is removed and connected to that part, the switching signal generation circuit can be similarly controlled in response to a fire alarm signal.
Furthermore, NFB is a circuit breaker built into the distribution board,
H transmits the lighting signal and lights-out signal given from the switching signal generation circuit to the switching circuit, and also forces the regular lighting circuit _b to the lighting state when a short circuit or disconnection of the signal lines A ₃ and A ₄ occurs. MC is an electromagnetic contactor that responds to the power failure compensation circuit H to prevent emergency lighting.

The switching signal generation circuit is as shown in FIG.
Contact RY ₂ of relay RY ₂ is connected to COM− by commercial power supply.
A voltage is constantly generated between the signal lines A ₃ and A ₄ via the NC (the contact state shown in the diagram indicates the lighting state), and the switch SW ₁ is set at the time t as shown in FIG. 6A. When switching from the NC (lit) side to the NO (unlit) side at step ₁ , relay RY ₃ is energized as shown in Figure 6B, and contacts ry _3a , ry _3b , and ry _3c are switched from the NC side to the NO side. , the short-time energization timer TM ₁ for turning off the light is energized, and the short-circuit of the timer time setting capacitor (not shown) is released, and the short-time energization timer TM ₁ switches SW as shown in FIG. 6C. A gate signal is given to thyristor Q ₁ through capacitor C ₁ for T ₁ hour after switching to the NO side of ₁ ,
Thereby, thyristor Q ₁ conducts for T ₁ hour as shown in FIG _{. 6D, and therefore relay RY 2 is} energized for T ₁ hour as shown in _FIG . Only the signal line A ₃ switches to the NO side,
The voltage between A _{and 4} is reduced to zero for ₁ hour (lights out time), and the normal lighting circuit _B of the emergency lighting equipment is switched to the 6th
As shown in FIG. F, the lighting state is switched to the off state, the capacitor (not shown) for setting the timer time of the long-time energization timer TM ₂ is short-circuited, and the power supply to the long-term energization timer TM ₂ is stopped.

Furthermore, when switch SW ₁ is switched from the NO side to the NC side at time t ₂ , the energization to the relay RY ₃ is stopped and the contacts ry _3a , ry _3b , and ry _3c are switched from the NO side to the NC side.
The long-time energization timer TM ₂ for lighting is energized and the short-circuit of the timer time setting capacitor is released, and after the long-time energization timer TM ₂ is switched to the NC side of the switch SW ₁ as shown in Figure 6G. A gating signal is applied to thyristor Q ₁ via capacitor C ₁ for T ₂ hours (T ₂ > T ₁ ), which causes thyristor Q ₁ to conduct for T ₂ hours and thus to relay RY ₂ for T ₂ hours. is energized, contact RY ₂ switches to the NO side for T ₂ hours, the voltage between signal lines A ₃ and A ₄ becomes zero voltage (lighting signal) for T ₂ hours, and the normal lighting circuit _B of the emergency lighting equipment is switched on. from the off state to the on state, short-circuits the timer time setting capacitor of the short-time energization timer _TM1 , and stops power supply to the short-time energization timer _TM1 .

On the other hand, if you turn off the batch lighting switch SW ₂ ,
The power to relay RY ₄ , which is in the self-holding state, is stopped, contacts ry _4a , ry _4b , ry _4c , and ry _4d switch from the NO side to the NC side, and switch SW ₁ switches to the NO (lights out) side. In some cases, long-time energization timer
When TM ₂ is energized, the short circuit of the timer time setting capacitor is released, and the long-time energization timer is activated.
Based on the operation of TM ₂ , the normal lighting circuit _b of the emergency lighting equipment is switched from the off state to the on state, and the pilot lamp PL ₁ is energized to indicate that it is all lit.

By opening the locking lighting interlocking contact _S1 ,
When the switch SW ₁ is switched to the NO side, the regular lighting circuit _b of the emergency lighting equipment can be turned on in the same way as when the switch SW ₁ is switched to the NC side. In addition, automatic fire alarm equipment transfer contact S ₂
By opening them, a batch lighting operation can be performed.

In addition, SW ₃ is a return type switch for self-holding the relay RY ₄ , F is a fuse, PL ₂ is a pilot lamp for indicating energization, and TR ₁ is a power transformer.

As shown in Figure 3, when the switchboard is supplied with voltage from the switching signal generation circuit via signal lines A ₃ and A ₄ (at all times), relay RY ₅ is energized by this voltage. Contacts ry _5a and ry _5b have been switched to the NO side, so the magnetic contactor MC is energized, contacts MC ₁ and MC ₂ are closed, and the commercial power supply is connected between power lines A ₅ and A _6. Voltage is generated and charging circuit _a
and the switching circuit, and power is also supplied to the regular lighting circuit _b via the contact ry ₁ of the relay RY ₁ to turn it on.

Also, when a turn-off signal or a turn-on signal is given from the switching signal generation circuit, relay RY ₅ is not energized.
Stop for T ₁ hour or T ₂ hours and close contacts ry _5a , ry _5b
switches to the NC side during that time, and therefore the power to the magnetic contactor MC is also stopped for T ₁ or T ₂ hours, contacts MC ₁ and MC ₂ are open during that time, and power lines A ₅ , There is zero voltage between A ₆ and zero voltage time T ₁
(light off signal), contact ry ₁ is set by the switching circuit.
switches to the NC side and switches the regular lighting circuit _b from the lighting state to the lighting state, and when the zero voltage time is T ₂ (lighting signal), the switching circuit switches contact ry ₁ to the NO side and changes from the lighting state to the lighting state. Switch. In addition, when the contact ry _5a switches to the NC side, the power failure compensation timer TM ₃ with the timer time T ₃ (T ₃ > T ₂ > T ₁ ) starts operating, but from the signal lines A ₃ and A ₄ If the applied signal is a normal light-off signal or light-on signal, contacts ry _5a and ry _5b switch to the NO side before the power failure compensation timer TM ₃ times up, and the power failure compensation timer TM ₃ does not time up.

Furthermore, if the commercial power supply is normal but the signals given from the signal lines A ₃ and A ₄ are abnormal signals, that is, if the zero voltage time is long, the power failure compensation timer TM ₃ times up and the signal is Line A ₃ ,
After time T ₃ has elapsed from the time when the voltage across A ₄ becomes zero, a gate signal is applied to thyristor Q ₂ via resistor R ₁ , which makes thyristor Q ₂ conductive and therefore energizes relay RY _6. contact ry ₆ switches from the NC side to the NO side, the magnetic contactor MC is energized, contacts MC ₁ and MC ₂ are closed, a voltage is generated between the power lines A ₅ and A ₆ , and the charging circuit _a Then, the power supply to the switching circuit is restarted to prevent emergency lighting of the emergency lighting equipment, and the switching circuit switches the contact RY ₁ of relay RY ₁ to the NO side, and the power supply to the regular lighting circuit _b is restarted, so that the lighting condition is maintained. shall be.

As shown in Fig. 4, in the switching circuit, when the contacts MC ₁ and MC ₂ of the electromagnetic contactor MC on the distribution board are opened, a current flows in the direction of the arrow y in the switch element (PUT) Q ₃ and the anode When current flows between the cathodes, current flows to the gate of thyristor Q ₄ , which activates relay RY ₁ and turns its contact RY ₁ to NO.
The commercial power supply' is connected to the regular lighting circuit _b , and the fluorescent lamp 13 is lit. At this time, the capacitor _C2 is charged, and when the charging voltage of the capacitor _C2 exceeds a predetermined value, the switch element _Q3 is cut off, but the thyristor _Q4 is maintained in a conductive state by the capacitor _C3 . Next, contact MC ₁ ,
When MC ₂ is opened, the charge stored in capacitor C ₂ is discharged through resistor R ₂ and the capacitor is
The voltage on C ₂ gradually drops. At this time, thyristor Q ₄ suddenly shuts off, excitation of relay RY ₁ stops, and contact ry ₁ switches to the NC side, and the power supply from the commercial power supply' to the normal lighting circuit _b stops and the normal lighting circuit _b is turned off. T When contacts MC ₁ and MC ₂ are closed again after about ₂ hours or more have elapsed, the potential at point b will drop to a because the amount of discharge of capacitor C ₂ is large.
The potential of switch element Q ₃ is lower than that of point Q3.
conducts again, thyristor Q ₄ conducts, and the relay
Since RY ₁ operates and contact RY ₁ switches to the NO side, the regular lighting circuit _b returns to the lighting state. In addition, if the opening time of contacts MC ₁ and MC ₂ is less than about T ₁ hour, the amount of discharge of capacitor C ₂ is small and the potential at point b is higher than the potential at point a, so switch element Q ₃ maintains the cut-off state. Therefore, thyristor _Q4 also remains off. Therefore, the relay RY ₁ is not energized and the contact ry ₁ remains switched to the NC side, and the regular lighting circuit _b is disconnected from the commercial power supply' and turns off. In this way, relay RY ₁ of the switching circuit is operated by opening and closing contacts MC ₁ and MC ₂ using the signal from the switching signal generation circuit, and contact ry ₁ can only cut off the power supply to normal lighting circuit _b . . Note that R ₃ to R ₁₂ are resistors, DB ₁ is a bridge rectifier, D ₁ and D ₂ are diodes, and PL ₃ is a pilot lamp.

As shown in Figure 5, the emergency lighting equipment consists of a charging circuit _a and a regular lighting circuit _b that are constantly supplied with power from the commercial power supply', and a regular lighting circuit that is supplied with power from the storage battery 9 of the charging circuit _a during a power outage of the commercial power supply'. circuit
It consists of a transistor inverter _c that turns on the fluorescent lamp 13 of _b in an emergency, and by switching contact ry ₁ , it is possible to interrupt the power supply to the normal lighting circuit _b while continuing the power supply to the charging circuit _a at all times. There is.

To explain in more detail, when the commercial power source is normal, the storage battery 9 is charged via the power transformer 5, bridge rectifier 6, and charging resistor 7, and the voltage between the power lines _A5 and _A6 causes a power outage. Detection relay 10 is energized and relay contacts 10a, 10
Turn b and 10c to the NO side, and connect commercial power '→contact
MC ₂ → Power line A ₆ → Contact ry ₁ → Terminal 2 → Chiyoke coil 12 → Relay contact 10a → Fluorescent lamp 13 →
Relay contact 10b → parallel circuit of glow starter 14 and noise prevention capacitor 14' → fluorescent lamp 13 → inspection switch 15 → terminal 3 → power line A ₅ →
Contact MC ₁ → Fluorescent lamp 13 in the commercial power supply route
Start the commercial power supply′ → Contact MC ₂ → Power line A ₆ →
Contact ry ₁ → terminal 2 → check coil 12 → relay contact 10a → fluorescent lamp 13 → inspection switch 15
→ Terminal 3 → Power line A ₅ → Contact MC ₁ → The fluorescent lamp 13 is normally lit through the commercial power supply route.

On the other hand, when the commercial power supply ' is out of power, charging of the storage battery 9 is stopped, and excitation of the power outage detection relay 10 is also stopped, and the relay contacts 10a, 10b, and 10c are closed.
It falls to the NC side, and power is supplied from the storage battery 9 to the transistor inverter _c through the relay contact 10c, and the transistor inverter _c starts high-frequency oscillation, and this high-frequency oscillation output causes the relay contact 10 to
The fluorescent lamp 13 is turned on in an emergency through the terminals a and 10b.

However, in such a configuration, when the switch SW ₁ of the switching signal generation circuit is switched to the NC side and the regular lighting circuit _b is in the lighting state,
As shown in Fig. 7A, when switch SW ₁ is repeatedly switched several times in a short period of time and switched to the NC side and then stopped, switch SW 1 is also switched to relay RY ₃ as shown in Fig. 7B. It is energized according to the switching of ₁ ,
During the switching operation of the switch SW ₁ , the short-time energization timer TM ₁ for turning off the light operates and a gate signal as shown in FIG. 7C is given to the thyristor Q ₁ , thereby causing the thyristor Q ₁ to The relay RY ₂ is energized as shown in Figure 7E, and the contact RY ₂ is switched to the NO side, and the final mode of the switch SW ₁ is the NC (lit) side. Nevertheless, the regular lighting circuit _b is shown in Figure 7F.
As shown in Figure 2, there was a problem in which the lights switched from a lit state to an off state (malfunction).

Note that the switching operation of the switch SW ₁ for a short period of time is, for example, when the switch SW ₁ is accidentally switched to the NO side while the light is on, and then immediately returned to the NC side. .

Therefore, an object of the present invention is to provide an emergency lighting device that can prevent the emergency lighting equipment from being erroneously turned off due to switching malfunction.

An embodiment of the present invention will be described based on FIGS. 8 to 11. This emergency lighting device
The switching signal generating circuit shown in FIG. 8 is replaced by the switching signal generating circuit shown in FIG. 8 and FIG. 2, and the other configurations are the same as the conventional example.

The switching signal generation circuit shown in Fig. 8 switches contact ry 1 to the normally closed side in response to a short-term power supply suspension, and switches contact _{ry 1 to} the normally open side in response to a long-term power supply suspension. It controls _the switching circuit _{which switches to} A relay that supplies power to the switching circuit via COM-NC of contact ry ₂ and is driven during the timer operation period of the short-time energization timer TM ₁ or long-time energization timer TM ₂ to switch contact ry ₂ to the normally open side. RY ₂ and a turn-off signal delay timer TM ₄ that interrupts transmission of the short-time energization timer selection operation of the switch SW ₁ to _{the short-time energization timer TM 1 that} is repeated within a short period of time. The light-off signal generated between signal lines A ₃ and A ₄ when switching from the NC side to the NO side is delayed by T ₄ hours (T ₄ > T ₂ > T ₁ ) using the light-off signal delay timer TM ₄ . I have to. To explain in more detail, the illustrated state is the lighting state, and the switch SW ₁ is in the state shown in FIG. 10A.
As shown in Figure 10B, the switch is made to the NC side, and the energization to relay RY ₇ is stopped as shown in Figure 10B, and contact RY ₇ is closed.
is switched to the NC side, and the timer for delaying the lights-out signal is activated.
Power is constantly supplied to TM ₄ , and its timer time setting capacitor (not shown) is short-circuited by contact ry ₇ , and the turn-off signal delay timer TM ₄ is supplied to thyristor Q 5 via capacitor C ₄ to thyristor Q ₅ (Fig. 10C).
A gate signal as shown in FIG. 10D is applied, thereby causing thyristor _Q5 to conduct as shown in FIG.
Therefore, relay RY ₈ is energized as shown in Fig. 10E, and contact RY ₈ is switched to the NO side, and the 10th
As shown in Figure F, relay RY ₃ is energized and the contacts
ry _3a , ry _3b , and ry _3c switch to the NO side, _the short-time energization timer _TM1 does not generate a gate signal as shown in FIG.
As shown in Figure _H , the energization to relay RY ₂ is stopped and contact ry ₂ switches to the NC side, and _the signal line A ₅ , A constant voltage is generated between ₆ and the normal lighting circuit _B
is in a lit state as shown in FIG. 10I.

In this state, switch SW ₁ is
As shown in Figure 10, when switching from the NC (on) side to the NO (lights off) side at time t ₁ , relay RY ₇ is energized as shown in Figure 10B, contact RY ₇ is switched to the NO side, and the lights off signal is output. The short-circuit of the timer time setting capacitor of the delay timer TM ₄ is released, the light-off signal delay timer TM ₄ starts its timer operation, and ₄ hours after the switch SW ₁ is switched to the NO side, the timer reaches the 10th timer. The generation of the gate signal is stopped as shown in Figure C, which causes thyristor Q ₅ to shut off as shown in Figure 10D, and therefore the energization of relay RY ₈ is stopped as shown in Figure 10E. and contact
ry ₈ switches from the NO side to the NC side, and as shown in Figure 10F, the current to relay RY ₃ is stopped and the contact is closed.
ry _3a , ry _3b , ry _3c switch from NO side to NC side,
After the switch SW ₁ is switched to the NO (lights off) side, the short-time energization timer TM ₁ for turning off the light is energized with a delay of ₄ hours, and the short circuit of the timer time setting capacitor is released, and the contacts ry _3a , ry _3b , ry T ₁ after switching to NC side of _3c
Short-time energization timer TM ₁ to capacitor
A gating signal is applied to thyristor Q ₁ via C ₁ as shown in FIG. 10G, which causes thyristor Q ₁ to conduct for a time T ₁ and thus
As shown in Figure 10H, RY ₂ is energized for T ₁ hour and contact RY ₂ switches to the NO side for T ₁ hour.
The voltage between signal lines A ₅ and A ₆ is reduced to zero voltage for T ₁ hour (lights off signal), and the normal lighting circuit of the emergency lighting equipment is switched on.
_b is switched from the lit state to the off state as shown in FIG. 10I, the capacitor for setting the timer time of the long-term energization timer TM ₂ is shorted, and the power supply to the long-term energization timer TM ₂ is stopped.

In addition, when switch SW ₁ is switched from the NO side to the NC side at time t ₂ , the power to relay RY ₇ is stopped, contact RY ₇ is switched to the NC side, and the timer for delaying the lights-out signal is activated.
Short-circuit the capacitor for setting the timer time of TM ₄ ,
A gate signal is immediately given to thyristor Q ₅ from timer TM ₄ for delaying the light-off signal, thyristor Q ₅ becomes conductive, relay RY ₈ is energized, and contact ry ₈ is applied.
switches to the NO side, relay RY ₃ is energized, contacts ry _3a , ry _3b , and ry _3c switch to the NO side, and the light is turned on based on the operation of the long-time energization timer TM ₂ , similar to the one in Fig. 2. Generate a signal.

Other configurations and operations are similar to those in FIG. 2.

As described above, in this embodiment, the light-off signal is output with a delay of ₄ hours T from when _{the switch SW 1 is} switched to the NO side. After switching to the side, as shown in FIG. 11B, the timer TM4 for delaying the light-off signal times up with a delay of _T4 hours, and as a result, _the timer _TM4 for short-time energization starts to turn off the thyristor Q as shown in FIG. 11C. Since a gate signal to ₁ is generated, switch SW ₁ is set to NC.
(lighting) side and the regular lighting circuit _b is in the lighting state, as shown in Figure 11A, repeat the switching operation of switch SW ₁ several times within a short time to switch it to the NC side. When it is stopped in the state, the energization to the relay RY ₇ is interrupted accordingly, but the timer TM ₄ for delaying the extinguishing time is
As shown in Figure 1B, the timeout does not occur and the switch is turned off.
The operation of SW ₁ is not transmitted to relay RY ₃ , so if there is a mistake in the operation of switch SW ₁ , the lock interlock contact S ₁
It is possible to prevent malfunctions of the switch and malfunctions of switching due to operational errors.

FIG. 9 shows a specific circuit configuration of the circuit portion of FIG. 8, and corresponding parts are given the same reference numerals. _R13〜
R16 is a resistor, and _D3 to _D6 are diodes.

As described above, the emergency lighting device of this invention is
A switching circuit that switches the contact to the normally closed side in response to a short-term power supply suspension and a switch to the normally open side in response to a long-term power supply suspension, a changeover switch, and a switching operation of the changeover switch. A short-time energization timer and a long-time energization timer that selectively operate in response to the timer, and a timer operation period of the short-time energization timer or long-time energization timer that supplies power from the power supply to the switching circuit through its own normally closed contact. a relay that is driven to open a normally closed contact; and a signal delay device that delays transmission of the short-time energization timer selection operation of the changeover switch to the short-time energization timer for a time longer than the timer setting time of the long-time energization timer. and a switching signal generation circuit having a timer, and an emergency lighting device having a built-in normal lighting circuit connected to the power supply via the contact, so that the short-time energization timer selection operation of the changeover switch The transmission to the time energization timer will be delayed for a longer time than the timer setting time of the long-time energization timer, and operation of the short-time energization timer due to repeated switching operations of the changeover switch within a short period of time will be prohibited, resulting in switching malfunction. In addition, when there is an erroneous operation of the changeover switch that is longer than the timer setting of the long-time energization timer, the emergency lighting equipment will switch to the lighting mode, and the emergency lighting equipment will be turned off as an emergency. Reliability can be increased.

[Brief explanation of drawings]

Figure 1 is a block diagram of a conventional emergency lighting system.
Figure 2 is a circuit diagram of the switching signal generation circuit, Figure 3 is a circuit diagram of the distribution board, Figure 4 is a circuit diagram of the switching circuit, and Figure 5 is a circuit diagram of the switching signal generation circuit.
The figure is a circuit diagram of the emergency lighting equipment, Figures 6A to 6G are waveform diagrams of each part of the switching signal generation circuit, and Figures 7A to F are waveform diagrams of each part of the switching signal generation circuit to explain the drawbacks. FIG. 8 is a circuit diagram of a switching signal generation circuit according to an embodiment of the present invention, FIG. 9 is a specific circuit diagram thereof, and FIGS. 10 A to I and FIGS. 11 A to C are waveform diagrams of each part thereof. . ...Switching signal generation circuit, SW ₁ ...Switch,
TM ₁ ...Short-time energization timer, TM ₂ ...Long-time energization timer, RY ₂ ...Relay, ry ₂ ...Contact, TM ₄
...Timer for delaying light-off signal, ...Switching circuit,
RY ₁ ...Relay, RY ₁ ...Contact.

Claims (1)

[Scope of Claims] 1. A switching circuit that switches a contact to a normally closed side in response to a short-term power supply suspension and switches a contact to a normally open side in response to a long-term power supply suspension, and a changeover switch; A short-time energization timer and a long-time energization timer that selectively operate in response to the switching operation of the changeover switch, and a short-time energization timer and a long-time energization timer that supply power from the power source to the switching circuit through its own normally closed contact A relay that is driven to open a normally closed contact during the timer operation period of the time energization timer, and a relay that is driven to open a normally closed contact during the timer operation period of the time energization timer, and a relay that transmits the short time energization timer selection operation of the changeover switch to the short time energization timer from the timer setting time of the long time energization timer. An emergency lighting device comprising: a switching signal generation circuit having a signal delay timer for delaying a signal for a long time; and an emergency lighting device incorporating a regular lighting circuit connected to the power supply via the contact.