JPH02172182A - Emergency lamp lightup device - Google Patents

Abstract

PURPOSE:To prevent ill influence upon the lifetime of a contact even in the case of contact is of mechanical type by changing over an emergency lighting control switch from On to Off when the AC mains are recovered, and changing over a lamp changeover switch from an emergency inverter circuit to a commercial inverter circuit until the lamp lifetime compensated operating time has elapsed thereafter. CONSTITUTION:When power failure on AC mains is recovered, oscillation of a commercial inverter circuit IN1 will start, and the oscillation output be impressed on a lamp. However, preheating of the lamp shall be made until the lamp lifetime compensated operation time has elapsed since the AC mains were recorded. After a certain while, a lamp changeover switch S1 is changed over from the emergency inverter circuit IN2 side to the commercial inverter circuit IN1. At this time, the oscillation motion of the inverter circuit IN2 is stopped through an emergency lighting control switch S2, and current supply to the lamp from the inverter circuit IN1 is in preheated condition even though the oscillating motion of the inverter circuit IN1 has been started, so that no contact arc will be generated at changeover operation of the changeover switch S1.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention provides an emergency lighting system that uses a high-frequency inverter circuit for both the commercial lighting circuit and the emergency lighting circuit, and that uses a lamp for both commercial lighting and emergency lighting. It is related to the device.

[Conventional technology]

Recently, commercial power sources have been rectified and smoothed (including partial smoothing) for the purpose of saving power, increasing luminous flux, and preventing flickering.
Circuits that use this as a power source to light discharge lamps at high frequencies are widely used.Hereinafter, this circuit will be referred to as a commercial inverter circuit.

Since this commercial inverter circuit frequently repeats blinking, for example, as disclosed in Japanese Patent Application Laid-Open No. 55-100695, the filament of the discharge lamp is preheated for a predetermined period of time immediately after the power is turned on. Efforts have been made to extend the life of the discharge lamp by applying a high voltage to the discharge lamp after the lapse of time. This preliminary preheating of the filament is performed to suppress wear and tear on the filament emitter due to cold cathode discharge of the discharge lamp.

In addition to the above, a method called soft start, in which the voltage applied to the discharge lamp is gradually increased, is known as a method for extending the life of the discharge lamp.

The time it takes for a discharge lamp to stably light due to the advance preheating and soft start described above can be found, for example, in the literature such as "Lighting Control Using Power Transistors," Electric Calculation J 1979.vol. 47, by Sugiyama et al. Generally, it is set to around 1 second.

On the other hand, there are emergency lighting devices that operate in the event of a power outage in the unlikely event of a disaster. Conventionally known emergency light lighting devices convert the voltage of the emergency power supply into high-frequency voltage and apply it to the discharge lamp in the event of a power outage of the commercial T4 power source. It was common practice to use a device to light a discharge lamp at a commercial frequency.

Therefore, by taking advantage of the advantages of commercial inverter circuits,
Naturally, an emergency light lighting device that can ensure safety in an emergency can also be considered.

In the case of such an emergency light lighting device, even if the commercial power supply fails, the commercial inverter circuit continues to oscillate for a while due to the accumulated charge in the smoothing capacitor included in the commercial inverter circuit, and during this period, the mechanical contacts The lamp changeover switch switches the lamp from the commercial inverter circuit to the emergency inverter circuit. This causes the inconvenience that the lamp changeover switch is welded.

As an example of trying to solve the problem of contact welding of the lamp changeover switch mentioned above, for example, the patent application filed in 1983, which the applicant has already filed,
There is one numbered 2-014853.

This prior art uses a lamp changeover switch to switch the lamp from the commercial inverter circuit to the emergency inverter circuit after the terminal voltage of the smoothing capacitor included in the commercial inverter circuit has sufficiently decreased after a commercial power outage. is delayed for a predetermined period of time.

FIG. 3 of the above-mentioned prior art shows a timer circuit for delaying switching between a lamp and both commercial and emergency lighting circuits. According to such a configuration, even when the commercial power supply is restored, the operation will be delayed.

Note that the above delay time must be determined by the discharge time of the smoothing capacitor included in the commercial inverter circuit, but as a result of investigating various commercial inverter circuits, it was found that several hundred m5 ec to several seconds are required.

[Problem to be solved by the invention]

In the prior art mentioned above, the commercial power supply is restored after the power outage (power is restored).
In this case, the lamp changeover switch switches the lamp from the emergency inverter circuit to the commercial inverter circuit, but the timer circuit works as described above for the switching operation at this time, and when the lamp changeover switch performs the switching operation, the lamp has already been switched from the commercial inverter circuit to the commercial inverter circuit. This means that the circuit has started oscillating. Therefore, when chattering occurs in the lamp changeover switch, an arc is generated between the contacts, which has a negative effect on the life of the contacts.

An object of the present invention is to provide an emergency light lighting device that does not adversely affect the life of the contacts when switching the lamp from an emergency inverter circuit to a commercial inverter circuit using mechanical contacts when commercial power is restored. It is.

[Means to solve the problem]

The emergency light lighting device of the present invention is provided with a commercial inverter circuit that converts the voltage of a commercial power source into a high frequency voltage, and
An emergency power source and an emergency inverter circuit that converts the voltage of this emergency power source into a high-frequency voltage are provided, and power is supplied from the commercial inverter circuit and the emergency inverter circuit to the lamps for commercial lighting and emergency lighting, respectively. I have it turned on in an emergency. In this case, the commercial inverter circuit is configured to suppress the voltage applied to the lamp below the steady voltage during the lamp life compensation operation period immediately after application of the commercial power supply voltage.

Further, an emergency lighting control switch is provided to control the operation of the emergency inverter circuit, and a lamp changeover switch is provided to switch and connect the lamp to the commercial inverter circuit and the emergency inverter circuit.

In this case, the lamp changeover switch consists of mechanical contacts.

Furthermore, when the commercial power is restored, the emergency lighting control switch is switched from on to off, and after that, the lamp changeover switch is switched from the emergency inverter circuit side to the commercial inverter circuit side before the lamp life compensation operation period has elapsed. A circuit is installed.

In the above, the lamp life compensation operation period refers to the period during which the voltage applied to the lamp is suppressed below the steady voltage immediately after the commercial power supply voltage is applied, in a configuration that extends the lamp life by performing advance preheating or soft start, etc. means.

[For production]

In the configuration of this invention, when the commercial power supply is restored, the emergency lighting control switch is first switched from on to off, power supply from the emergency power supply to the emergency inverter circuit is stopped, and oscillation of the emergency inverter circuit is stopped. , the lamp's emergency lighting ends.

Then, the lamp changeover switch is switched from the emergency inverter circuit side to the commercial inverter circuit side.

This switching operation of the lamp changeover switch is performed after the emergency lighting control switch is switched from on to off and before the lamp life compensation operation period has elapsed.

At this time, the oscillation operation of the emergency inverter circuit has already stopped, and the voltage applied to the lamp from the commercial inverter circuit is suppressed to a level lower than the steady voltage, so even if chattering occurs during the switching operation of the lamp changeover switch, , the occurrence of contact arc is sufficiently small that it does not adversely affect the life of the contacts of the lamp changeover switch.

After that, when the lamp life compensation operation period ends, a steady voltage is applied to the lamp from the commercial inverter circuit.
The lamp enters a steady commercial lighting state.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an emergency light lighting device according to a first embodiment of the present invention.

The emergency light lighting device shown in FIG. 1 includes a commercial inverter circuit IN that rectifies and smoothes (including partial smoothing) the voltage of a commercial power supply AC and then converts it into a high-frequency voltage.

An emergency power source B consisting of, for example, a storage battery and an emergency inverter circuit IN2 for converting the voltage of the emergency power source B into a high frequency voltage are provided. Then, power is supplied from the commercial inverter circuit IN and the emergency inverter circuit IN2 to lamps LP such as discharge lamps for both commercial lighting and emergency lighting, respectively, so that the lamps LP are turned on for commercial purposes and for emergency lighting. In this case, the commercial inverter circuit I
N.

The voltage applied to the lamp LP is suppressed below the steady voltage during the lamp life compensation operation period immediately after the voltage application of the commercial power supply AC, for example during the advance preheating period (for example, only the filament voltage is applied, and the lamp for lighting is (no voltage is applied).

In addition, an emergency lighting control switch S2 that controls the operation of the emergency inverter circuit IN2 is inserted between the emergency power supply B and the emergency inverter circuit IN2, and the lamp LP is connected to the commercial inverter circuit IN and the emergency inverter circuit IN2. A lamp changeover switch S is provided for switching connection to the lamp. In this case, the lamp changeover switch S1- consists of a mechanical contact such as a mechanical relay contact, and the normally open terminal is connected to the commercial inverter circuit IN, and the normally closed terminal is connected to the emergency inverter circuit I.
It is connected to the N2 side, and the common terminal is connected to the lamp LP.

Furthermore, a power outage detection circuit T that detects a power outage of commercial power AC
A switching control n circuit S that controls the lamp changeover switch S1 and the emergency lighting control n switch S2.
C1 is provided.

In this case, according to the output of the power outage detection circuit TK, the switching control circuit S01 switches the lamp changeover switch S1 from the commercial inverter circuit IN side to the emergency mode after a predetermined time (for example, about 1 second) has elapsed after the power outage of the commercial type i [Ac. The switch is switched to the inverter circuit IN2 side, and then, after a predetermined time delay, the emergency lighting control switch S2 is switched from off to on.

In addition, when the commercial power supply AC is restored, the emergency lighting control switch S2 is first switched from on to off, and then, after a predetermined delay, the lamp changeover switch S1 is switched to the emergency inverter circuit I.
Switch from the N2 side to the commercial inverter circuit IN side.

This switching of the lamp changeover switch S1 is performed before the lamp life compensation operation period has elapsed.

Next, the operation of this emergency light lighting device will be explained with reference to FIG. In FIG. 2, ta+ indicates the state of the commercial power supply AC, fbl indicates the state of the lamp changeover switch S1, and (c) indicates the emergency lighting side? It shows the state of the J switch S2, and fdl shows the state of advance preheating.

In this emergency light lighting device, during a power outage of the commercial power supply AC, the switching control circuit S0 is based on the output of the power outage detection circuit TK.
1 operates as follows.

When the commercial power supply AC is interrupted at time t1 as shown in FIG. 2 tal, the power supply from the commercial amount HAc to the commercial inverter circuit IN is stopped. At this time, the commercial inverter circuit IN maintains its oscillating operation for a while due to the charge accumulated in the smoothing capacitor (not shown).

Then, at time t2, when a predetermined period of time has elapsed (longer than the duration of oscillation of the commercial inverter circuit IN) after the power outage of the commercial power supply AC, the lamp changeover switch S1 is switched to the state shown in FIG. 2(b).
From the normally open terminal side to the normally closed terminal side, that is, from the commercial inverter circuit IN, and from the side to the emergency inverter circuit IN2.
Switch to the side. At this time, the oscillation operation of the commercial inverter circuit IN has weakened sufficiently, the oscillation output of the commercial inverter circuit IN has sufficiently decreased, and power supply to the emergency impark circuit IN2 has not yet started, and the emergency inverter Circuit IN2 is not oscillating. Therefore, even if chattering occurs during the switching operation of the lamp changeover switch S1, contact arcing will not occur and the life of the contacts of the lamp changeover switch S1 will not be adversely affected. In other words, the lamp changeover switch S1 can be protected. Can be done.

Then, for a predetermined period of time from time t2 (lamp changeover switch S
1 or more, for example about 20 m5
ec) At the elapsed time t3, the emergency lighting control switch S2 is switched from OFF to ON as shown in FIG. Oscillation starts and the lamp LP lights up in an emergency. At this time, (13
-1,) Since there is a time delay and the operation of the emergency inverter circuit IN2 is not started immediately, even if some chattering occurs when switching the lamp changeover switch S1, the emergency inverter circuit IN2 is not activated during this chattering period. Inverter circuit I
The output of N2 is not applied to the lamp changeover switch S1, and it is possible to prevent the contact life of the lamp changeover switch S1 from being shortened due to chattering of the lamp changeover switch S1.

Next, when the commercial power supply AC is restored, the following operation is performed.

At time t, the commercial power AC
When the power outage is restored, the emergency lighting control switch S2 is immediately turned on.
is switched from on to off as shown in Figure 2 (C1), the power supply from the emergency power supply B to the emergency inverter circuit IN2 is stopped, and the oscillation of the emergency inverter circuit IN2 is stopped.
End the emergency lighting of lamp LP. At the same time, the oscillation operation of the commercial inverter circuit IN starts, and the oscillation output is applied to the lamp LP. However, from time t4 when the commercial IT source AC is restored to time t6 after the lamp life compensation operation period (for example, about 1 second) has elapsed,
The lamp LP is preheated as shown in FIG.

Next, a predetermined period of time (for example, about 20 m5 ec) starts from time t4.
), at the elapsed time t, the lamp changeover switch S,
is switched from the normally closed terminal side to the normally open terminal side, that is, from the emergency inverter circuit IN2 side to the commercial inverter circuit IN side, as shown in FIG.

At this time, the oscillation operation of the emergency inverter circuit IN2 has already stopped, and the oscillation operation of the commercial inverter circuit IN2 has already stopped.

Although the oscillation operation has started, the power supply from the commercial inverter circuit IN to the lamp LP is in the preliminary preheating state, so even if chattering occurs during the switching operation of the lamp changeover switch S1, contact arcing will not occur. However, there is no adverse effect on the life of the contacts of the lamp changeover switch Sl. Note that when the advance preheating period is, for example, 1 second, it is desirable to switch the lamp changeover switch S1 within 10% of 1 second, that is, within 100 m5ec. In this case, the delay from time t4 to time t is Time is 20ms
If the power failure detection circuit TK has a delay time of approximately 30 m5ec in its power failure detection operation, the lamp changeover switch Sl will be switched in approximately 5 Qm5ec after the commercial aAC power outage is recovered. Become a lamp LP
There is no problem in terms of service life.

Then, at time L6, which is a predetermined time after time t, the above-described advance preheating ends and the lamp LP enters a steady lighting state.

FIG. 3 is a circuit diagram showing a specific configuration of the circuit block in FIG. 1.

The emergency light lighting device shown in Fig. 3 uses a choke coil CH that constitutes a noise prevention filter F in a commercial @ source AC.

and the commercial inverter circuit IN via the capacitor CI
, is connected.

This commercial inverter circuit IN includes a full-wave rectifier RE that performs full-wave rectification of the voltage of a commercial power supply AC, and a full-wave rectifier RE.
, an inverter circuit main body part IV that changes the voltage obtained across the capacitor C2 into a high-frequency voltage, and a preheating switch for preheating the lamp LP. S. and this advance preheating switch S. The preheating circuit SY controls the preheating circuit SY, and starts operating when the commercial power supply AC is turned on.

In this case, the inverter circuit main body IV is a well-known automatic two-stone push-pull impark circuit, which includes oscillation transistors Q, Q2, a resonance capacitor C3, a leakage type oscillation transformer T1, and a constant current choke coil CH2, base resistors R2 and R3 of transistors Q, Q2, starting resistor R4, and base power supply diode D1 that rectifies a part of the induced voltage of the oscillation transformer T1.
and a capacitor C4. Since the operation of this circuit is well known, a description thereof will be omitted.

At the output end of the commercial inverter circuit IN, there is a lamp changeover switch S11°Sl!, which is composed of a relay contact. between the normally open terminal and the common terminal of and the advance preheating switch S,
Lamp LP is connected via.

Here, the advance preheating circuit SY will be explained.

This advance preheating circuit SY is a timer integrated circuit (for example,
Signetinx NE555) ICI and 1
A resistor R4 and a capacitor C (constituting a monostable multi-high break) for setting a preliminary warm-up time of the order of seconds, a capacitor C6, a transistor Q3. Q.
resistors R,, R6, a mechanical relay RY having the advance preheating switch S0 as a relay contact, and a diode D2.
Power is supplied from both ends of a capacitor C4 for the base power supply of the inverter circuit main body section.

The operation will be explained. When the inverter circuit main body IV starts oscillating and a voltage is generated across the capacitor C4, the timer integrated circuit ICI immediately lowers the output to a low level (
(hereinafter referred to as L) to a high level (hereinafter referred to as H) (see time t4 in FIG. 2 (dl)). As a result, transistor Q3 turns on and transistor Q4
is turned off, relay RY0 is not energized, advance preheating switch S0 is turned off, voltage is not applied between both filaments of lamp LP, and lamp LP enters the advance preheating state.

The timer integrated circuit IC8 then returns the output to L after about 1 second has elapsed (see Figure 2 (time [6) of dl). As a result, the transistor Q3 is turned off, the transistor Q4 is turned on, and the relay is turned off. RY.

energization is started, the advance preheating switch S0 is turned on, voltage application between both filaments of the lamp LP is started, and the lamp LP enters a steady lighting state.

In addition, this emergency light lighting device connects a full-wave rectifier RE2 to a commercial power supply AC via a step-down transformer T3, and connects a charging resistor R7 and a diode D from the output side of the full-wave rectifier RE2.
A storage battery, which is an emergency power source B, is charged via the power source B.

The above emergency power supply B includes a transistor Q7 and a resistor R.
An emergency inverter circuit ■N2 is connected via an emergency lighting control switch S2 consisting of a transistor Q.
7 is turned on, the emergency inverter circuit IN2 is activated.

This emergency inverter circuit IN2 is a well-known automatic two-stone bush-pull inverter circuit, similar to the commercial inverter circuit IN described above, and includes an oscillation transistor Q,
, Q6, resonance capacitor C8, and oscillation transformer T
2, a constant choke coil CH3, and a transistor Q3. Q.

The base resistance RIO1R11,RH and the oscillation transformer T
Capacitor C9, C, provided on the secondary side of 2. When transistor Q7 is turned on, transistor Q,
, Q6 starts being supplied with base current and starts oscillating. Since the oscillation operation of this circuit is also well known, its explanation will be omitted.

A lamp LP is connected to the output end of the emergency inverter circuit IN2 via the normally closed terminals and common terminals of the lamp changeover switches Sll and SI2.

The power failure detection circuit TK includes a diode D7. It consists of resistors R13, RI4 and capacitor C11. This power failure detection circuit TK is configured to divide, rectify, and smooth the pulsating voltage appearing on the output side of the full-wave rectifier RE2, and when the commercial N and source AC are energized, a predetermined voltage appears across the capacitor C0. , when the commercial power supply AC is interrupted, the voltage across the capacitor C11 drops to zero. Note that since the capacitance of the capacitor CI+ is very small, it quickly drops and rises during a power outage and power restoration of the commercial power supply AC. The delay time of power failure detection by this power failure detection circuit TK is, for example, 30 m sec.
That's about it. In addition, in the time chart of FIG. 2, the delay time of power failure detection in the power failure detection circuit TK is ignored.

Next, the configuration and operation of the switching control circuit S01 that responds to the output of the power failure detection circuit TK will be explained.

In this switching control circuit SCI, RY is a lamp changeover switch S□, Sl! This is a mechanical relay RY, which exists as a relay contact. Q9 is a transistor that controls energization to relay RY, and Q8 is an emergency lighting control switch S.
This is a transistor that controls on/off of the transistor Q7 that constitutes the transistor Q7. R9 is a resistor, R11R1* is a transistor Q9. This is the base resistance of Q8. N.T.
~NT is an inverting circuit, OR is an OR circuit, and AN is an AND circuit. RIs, RII, R17 are resistors for setting delay time, CII, CI3 = CI4 are also capacitors, resistor RI5 and capacitor CI
2 sets a delay time of approximately 1 second, resistor R11 and capacitor CI3, resistor RIt and capacitor CI
4 sets a delay time of approximately 20 m5ec.

C7 is a capacitor that provides the operating pH of the relay RY, and is charged from the full-wave rectifier RE2 through the diode D3, and is also charged from the emergency i source B through the diode D4. D6 is a diode.

The operation of the above configuration will be explained with reference to FIG. 2.

Before time [1], the commercial power supply AC is in the energized state, and the outputs of the inverting circuits NT, , NT3 are respectively connected to the inverting circuit N.
T2. The outputs of NT and NT are respectively H. Further, the output of the OR circuit OR is H, and the output of the AND circuit AN is set. Therefore, the transistor Q8 is off, and the transistor Q7 constituting the emergency lighting control switch S2 is off.

Further, the transistor Q is on, energizing the relay RY, and the lamp changeover switches SII and SH are switched to the normally open terminal side.

At time t1, the commercial amount [When AC power is cut off, the inverting circuit NT
The output of NT2 changes from L to H, and therefore the inverting circuit NT2
The output changes from ■( to L as shown in Fig. 2 ta).

Time (hereinafter, time t when a predetermined time (for example, 1 second) determined by the time constant of resistor RIS and capacitor CI□ has elapsed)
At 2, the output of the inverting circuit NT3 changes from L to 1, and therefore the output of the inverting circuit NT4 changes to 11.
Furthermore, the output of the off-circuit OR, is 1 as shown in Fig. 2fb).
1 Changes to mustard. As a result, transistor Q9 is turned off and relay RY is turned off.

The lamp changeover switches 311 and 312 stop being energized.
switches from the normally open terminal side to the normally closed terminal side.

At time t3, when a predetermined time (approximately 20 m5 ec) determined by the time constant of resistor RH and capacitor CI3 has elapsed after time (2), the output of AND circuit AN changes from L to H as shown in FIG. As a result, transistor Q8 is turned on, and transistor Q7, which constitutes emergency lighting control switch S2, is turned on.

Subsequently, at time t4, when the commercial power supply AC is restored, the output of the inverting circuit NT changes from H to L, and therefore the output of the inverting circuit NT2 changes from L to H as shown in Figure 2 Cat. The output of the circuit AN changes from H to L as shown in FIG. 2 f01. As a result, transistor Q8 is turned off, and transistor Q7, which constitutes emergency lighting control switch S2, is turned off.

After time t4, at time t, when a predetermined time (approximately 20 m5ec) determined by the time constant of resistor RI7 and capacitor C14 has elapsed, the output of OR circuit OR changes from L to H as shown in FIG. 2 tbl. As a result, transistor Q
9 is turned on, relays RY and 1i11iJ start, and lamp changeover switch S11. SH switches from the normally closed terminal side to the normally closed terminal side.

Note that, as described above, the advance preheating starts at time t4,
The process ends at time t, and after time t6, the lamp LP is in a steady lighting state.

The emergency lighting': fi1fit switch S2 only needs to be able to substantially control the operation of the emergency inverter circuit IN2, and its configuration is not limited to the embodiments shown in FIGS. 1 to 3, but may be of any configuration. It may be.

In addition, when the commercial power supply AC is restored, the lamp changeover switch SI
In terms of the life of the lamp LP, it is desirable to switch between + and -311 before 10% of the lamp life compensation operation period has elapsed.

Further, in the above embodiments, preliminary preheating is performed as the lamp life compensating operation, but an embodiment of the present invention that performs lamp life compensating by a so-called soft start method can also be mentioned.

FIG. 4 is a circuit diagram showing the configuration of an emergency light lighting device according to a second embodiment of the present invention. The emergency light lighting device in FIG. 4 uses a switching control circuit SC2 in place of the switching control circuit S01 in FIG. 3, and the other configurations are the same as that in FIG. 3.

The switching control circuit S01 in FIG. 4 is a power failure detection circuit T
Based on the voltage across the capacitor C11 of K, tp is the pressure ■R(
A comparator CP1 and a comparator CP that compare the voltage across the capacitor CI+ (which is set to, for example, about 2) when the commercial electric power AlAc is energized.

Resistor R to delay the output of, for example, about 20m5ec
1, and a capacitor CI5, a timer integrated circuit (for example, NE555 manufactured by Signetics) IC2, a resistor R□ for setting a time of about 1 second in this timer integrated circuit IC2, and a capacitor C1 (monostable multi-byte). ) constituting a break, and a capacitor CI7,
For example, the output of the timer integrated circuit IC2 is 20 m5ec.
Resistor R12 and capacitor CI8 for delay
, an OR circuit 0R2 to which the voltage at the connection point of the resistor R2° and the capacitor CIS and the output of the timer integrated circuit IC2 are input, and the voltage at the connection point between the output of the comparator CP and the resistor R1° and the capacitor CI8. With input NOR circuit NO3, transistor Q8. Q.

It creates signals to control the. The other configurations are similar to the switching control circuit S01 in FIG. 3, and although a detailed explanation will be omitted, the operation is also similar to the switching control circuit SC, and the time chart is also shown in the same manner as in FIG. 2.

The emergency light lighting device of this embodiment is the same as that of FIG. 3 except for the above points. In addition to the effects of the first embodiment, the use of the timer integrated circuit IC2 in the switching control circuit Sc2 provides a long timer time (approximately 1 second).
This has the effect of making the settings more accurate, reducing variations in the timer time, and ensuring stable operation.

〔Effect of the invention〕

According to the emergency light lighting device of the present invention, an emergency lighting control switch that controls the operation of the emergency inverter circuit and a lamp changeover switch that switches and connects the lamp to the commercial inverter circuit and the emergency inverter circuit are provided, and these switches The switching control circuit 11 switches the emergency lighting control switch from on to off when the commercial power is restored, then switches the lamp changeover switch from the emergency inverter circuit side to the commercial inverter circuit side, and after this, the lamp life compensation operation period ends. Since the lamp changeover switch is switched from the emergency inverter circuit side to the commercial inverter circuit side before the time elapses, the lamp changeover switch is switched from the emergency inverter circuit side to the commercial inverter circuit side. It is possible to perform the switching operation of the lamp changeover switch, and when switching the lamp from the emergency inverter circuit to the commercial inverter circuit using mechanical contacts, it is possible to prevent the contact life from being adversely affected when the commercial power is restored. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an emergency light lighting device according to a first embodiment of the present invention, FIG. 2 is a time chart showing the operation of FIG. 1, and FIG. 3 is a concrete diagram of the circuit block of FIG. 1. FIG. 4 is a circuit diagram showing the structure of an emergency light lighting device according to a second embodiment of the present invention. AC...Commercial power supply, B...Emergency power supply, IN...
・Commercial inverter circuit, IN2...Emergency inverter circuit, LP...Lamp, TK...Power failure detection circuit, S
C. ...Switching control 8 circuits, SL...Lamp changeover switch, S2...Emergency lighting control switch 1 Figure

Claims (1)

[Claims] A lamp that can be used for both commercial lighting and emergency lighting, and converting the voltage of a commercial power source into a high-frequency voltage and supplying it to the lamp to turn the lamp on commercially, and during a lamp life compensation operation period immediately after the voltage of the commercial power source is applied. includes a commercial inverter circuit that suppresses the voltage applied to the lamp below a steady voltage, an emergency power source, and converts the voltage of the emergency power source into a high-frequency voltage and supplies it to the lamp to turn on the lamp in an emergency. an emergency inverter circuit, an emergency lighting control switch that controls operation of the emergency inverter circuit, and a lamp changeover switch that switches and connects the lamp to the commercial inverter circuit and the emergency inverter circuit;
Switching the emergency lighting control switch from on to off when the commercial power supply recovers from a power outage, and then switching the lamp changeover switch from the emergency inverter circuit side to the commercial inverter circuit side before the lamp life compensation operation period elapses. An emergency light lighting device equipped with a switching control circuit for switching.