JPH09161977A - Emergency lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the wiring and preclude flow of a shortcircuit current even in the case a filament is short-circuited. SOLUTION: An AC main E is connected parallel with a power supply for an inverter circuit 4, and this parallel circuitry is connected with one-side ends of filaments FL1, FL2. A starter 11 is connected parallel with one which is for starting a capacitor C11, and this is connected with the other side ends of the filaments FL1 and FL2, so that wiring can be decreased and simplified, and malfunction associate with noises is prevented and a small-sized construction is accomplished. Because no filament winding is provided for preheating the filaments, no shortcircuit current will flow even if the filaments are shortcircuited. When the AC main E is used, the starting is made by the starter 11, and when inverter circuit 4 is used, the start is made with the starting capacitor C11, so that the lamp FL is actuated in their respective optimum conditions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency lighting device for lighting a discharge lamp regardless of whether the AC power supply is out of power or not.

[0002]

2. Description of the Related Art As a conventional emergency lighting device, for example, a structure shown in FIG. 3 is known. In the emergency lighting device having the configuration shown in FIG. 3, the commercial AC power source E includes one filament FL1 of the fluorescent lamp FL as a discharge lamp and the other through the inductor L1 as a ballast and the switching circuit 1 as a switching means. Connected to filament FL2.

Between the terminals of the commercial AC power supply E, a constant voltage element Z1 and a primary winding Tr1a of a step-down transformer Tr1 are provided.
Are connected. And commercial AC power supply E
And a triac Q1 is connected between the fluorescent lamp FL,
A capacitor C1 is connected in parallel with the triac Q1. In addition, the gate of this triac Q1 is a resistor
Primary winding of transformer Tr1 through a series circuit of R1, zener diode ZD1 for constant voltage and zener diode ZD2
A capacitor C2 is connected between the middle of Tr1a and between the gate and one end of the triac Q1.

Further, the secondary winding Tr1b of this transformer Tr1
Is connected to the input terminal of the full-wave rectifier 2, and between the output terminals of the full-wave rectifier 2, the emitter of the transistor Q2,
A series circuit of a collector, a resistor R1 and a capacitor C3 is connected, and a light emitting diode LED1 for monitoring is connected in parallel to the capacitor C3. Between the output terminals of the full-wave rectifier 2, a resistor R2, a diode D1, a diode D2,
A series circuit of the fuse F and the battery B is connected, and the connection point of the resistor R2 and the diode D1 is connected to the base of the transistor Q2 via the resistor R3.

Then, the diode D1 and the diode D2
Between the connection point and the negative electrode of the full-wave rectifier 2, the control circuit 3
Is connected. In this control circuit 3, a parallel circuit of a capacitor C4 and a resistor R4 is connected between the connection point of the diodes D1 and D2 and the negative electrode of the full-wave rectifier 2,
The connection point of the diode D1 and the diode D2 is connected to the base of the transistor Q3 via the resistor R5, and the emitter of this transistor Q3 is connected to the diode D2.

Further, a push-pull type inverter circuit 4 is connected to the diode D2. This inverter circuit 4 is connected to the midpoint of the input winding Tr2a of the inverter transformer Tr2 via the choke coil L2, and one end of this input winding Tr2a is the negative electrode of the full-wave rectifier 2 via the emitter and collector of the transistor Q4. The other end of the input winding Tr2a is connected to the negative electrode of the full-wave rectifier 2 via the emitter and collector of the transistor Q5. Also, the input winding Tr
A parallel circuit of a constant voltage element Q6 and a capacitor C6 is connected to 2a. Furthermore, the inverter transformer Tr2 has a control winding Tr2c, and one end of this control winding Tr2c is
The other end of the base of the transistor Q4 is connected to the base of the transistor Q5, the base of the transistor Q4 is connected to the collector of the transistor Q3 via the resistor R7, and the base of the transistor Q5 is connected to the collector of the transistor Q3.

The output winding Tr2b of the inverter transformer Tr2 has one end connected to the filament FL1 of the fluorescent lamp FL via a capacitor C7 and the other end connected to the filament FL2 of the fluorescent lamp FL.

Further, the inverter transformer Tr2 has a filament preheating winding Tr2d and a filament preheating winding Tr2e, and the filament preheating winding Tr2d is connected to the filament FL1 via a current limiting capacitor C8, and the filament preheating winding Tr2d is connected to the filament preheating winding Tr2d. The line Tr2e is connected to the filament FL2 via the current limiting capacitor C9.

Further, the filament FL1 of the fluorescent lamp FL
A series circuit of an inductor L3 and a starter 6 is connected between and the filament FL2, and the starter 6
A capacitor C10 is connected in parallel with.

When the commercial AC power source E is not shut down,
The voltage of the primary winding Tr1a of the transformer Tr1 is set to the voltage set by the constant voltage element Z1, and the zener diode ZD1 or zener diode ZD2 turns on according to the polarity every time the voltage of the primary winding Tr1a reaches a specified value, and the triac turns on. Turn on Q1, voltage is applied through inductor L1, and starter 6
Fluorescent lamp FL by preheating filaments FL1 and FL2 by
Is turned on.

On the other hand, the voltage is reduced by the transformer Tr1 and full-wave rectified by the full-wave rectifier 2, and the battery B is charged through the resistor R3, the diode D1 and the diode D2. Also, battery B
When the charging voltage is low, a charging current flows and a potential difference occurs in the resistor R3, so that the transistor Q2 is turned on and the light emitting diode LED1 emits light to indicate that charging is in progress. Then, as the charging of the battery B progresses and the current flowing through the resistor R3 becomes smaller and the potential difference of the resistor R3 decreases, the transistor Q2
Is turned off, the light emitting diode LED1 is turned off, and the battery B has been charged.

When the commercial AC power source E is in a non-power failure state, the base of the transistor Q3 is reverse-biased, so that the inverter circuit 4 is not supplied with power and does not operate.

When the commercial AC power source E fails, the voltage of the primary winding Tr1a drops below a predetermined value, the Zener diode ZD1 or the Zener diode ZD2 is in the reverse blocking state, and the triac Q1 is kept in the OFF state. No power is supplied to the fluorescent lamp FL via L1.

Since the reverse bias of the base of the transistor Q3 disappears, the DC power of the battery B is supplied to the inverter circuit 4, and the inverter circuit 4 oscillates at a high frequency to induce a high frequency AC at the output winding Tr2b to generate a high frequency. Supply the fluorescent lamp FL to start and light it. The output from the inverter circuit 4 is lower than the output via the inductor L1.

[0015]

However, in the case of the conventional example shown in FIG. 3, the number of wiring switches between the inverter transformer Tr2 and the fluorescent lamp FL is increased, which makes it difficult to reduce the size, and the influence of noise and the like is also reduced. It has a problem that it is easily received, and further, if the filaments FL1 and FL2 are short-circuited, a short-circuit current may flow in the filament preheating windings Tr2d and Tr2e.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide an emergency lighting device that simplifies wiring and prevents short-circuit current from flowing even when a filament is short-circuited.

[0017]

An emergency lighting device according to claim 1 detects a power failure and a non-power failure of a commercial AC power source,
When the commercial AC power supply is not interrupted, the commercial AC power supply supplies electric power via a normal lighting circuit and charges the battery with the commercial AC power supply. When the commercial AC power supply fails, the DC from the battery is converted into an inverter. In the emergency lighting device, which is converted and supplied by a circuit to light a discharge lamp having a pair of filaments after preheating the filament by a starter, a normal lighting circuit and an inverter are provided at one end side of each of the pair of filaments of the discharge lamp. A circuit is connected in parallel, and the starter is connected in parallel to the other end of each of the pair of filaments of the discharge lamp, and the power supply source and the starter are distributed to one end and the other end of the filament. This simplifies the wiring.

The emergency lighting device according to a second aspect of the present invention detects a power failure and a non-power failure of the commercial AC power source, and supplies the power from the commercial AC power source through the normal lighting circuit when the commercial AC power source is not powered off. At the same time, the battery is charged by the commercial AC power supply, and when the commercial AC power supply is interrupted, the DC from the battery is converted and supplied by an inverter circuit, and a discharge lamp having a pair of filaments is preheated and then turned on. In the lighting device for a vehicle, a starter for preheating the filament of the discharge lamp at the time of starting by the commercial AC power source, and a starting capacitor for preheating the filament of the discharge lamp at the time of starting by the inverter circuit are provided, and a pair of the discharge lamp The normal lighting circuit and the inverter circuit are provided on one end side of each filament. Are connected in parallel, and the starter and the starting capacitor are connected in parallel to the other end of each of the pair of filaments of the discharge lamp. Wiring is simplified by distributing the parts used for starting the lamp to start it, and the starter and the starting capacitor are used to ensure the starting in correspondence with the starting of each of the normal lighting circuit and the inverter circuit.

An emergency lighting device according to a third aspect of the present invention detects a power failure and a non-power failure of the commercial AC power source, and supplies the power from the commercial AC power source through the normal lighting circuit when the commercial AC power source is not powered off. In addition, the battery is charged by the commercial AC power supply, and when the commercial AC power supply is interrupted, the DC from the battery is converted and supplied by the inverter circuit, and the discharge lamp having the filament is preheated after the filament is lit for emergency lighting. In the device, a starter for preheating a filament of the discharge lamp by a timer at the time of starting by the normal lighting circuit and a resonance means for preheating the filament of the discharge lamp by resonance at the time of lighting by the inverter circuit are provided. The starter and To ensure start-up using the starting capacitor.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an emergency lighting device of the present invention will be described below with reference to the drawings. The parts corresponding to the conventional example shown in FIG.

The emergency lighting device having the structure shown in FIG.
A commercial AC power supply E having a frequency of 50 Hz or 60 Hz is connected through an inductor L1 serving as a ballast, which normally serves as a lighting circuit, and a switching circuit 1 serving as switching means, to one end and the other end of one filament FL1 of a fluorescent lamp FL serving as a discharge lamp. Is connected to one end of filament FL2.

Between both terminals of the commercial AC power source E, a constant voltage element Z1 and a primary winding Tr1a of a step-down transformer Tr1 are provided.
Are connected. And commercial AC power supply E
And a triac Q1 is connected between the fluorescent lamp FL,
A capacitor C1 is connected in parallel with the triac Q1. In addition, the gate of this triac Q1 is a resistor
Primary winding of transformer Tr1 through a series circuit of R1, zener diode ZD1 for constant voltage and zener diode ZD2
A capacitor C2 is connected between the middle of Tr1a and between the gate and one end of the triac Q1.

The input terminal of the full-wave rectifier 2 is connected to the secondary winding Tr1b of the transformer Tr1.
A series circuit of the emitter and collector of transistor Q2, resistor R1 and capacitor C3 is connected between the output terminals of
A light emitting diode LED1 for monitoring is connected in parallel to the capacitor C3. A series circuit of a resistor R2, a diode D1, a diode D2, a fuse F and a battery B is connected between the output terminals of the full-wave rectifier 2,
The connection point of R2 and diode D1 is connected to the base of transistor Q2 via resistor R3.

Then, the diode D1 and the diode D2
Between the connection point and the negative electrode of the full-wave rectifier 2, the control circuit 3
Is connected. In this control circuit 3, a parallel circuit of a capacitor C4 and a resistor R4 is connected between the connection point of the diodes D1 and D2 and the negative electrode of the full-wave rectifier 2,
The connection point of the diode D1 and the diode D2 is connected to the base of the transistor Q3 via the resistor R5, and the emitter of this transistor Q3 is connected to the diode D2.

A push-pull type inverter circuit 4 having a frequency of about 45 kHz is connected to the diode D2. This inverter circuit 4 is connected to the midpoint of the input winding Tr2a of the inverter transformer Tr2 via the choke coil L2, and one end of this input winding Tr2a is the negative electrode of the full-wave rectifier 2 via the emitter and collector of the transistor Q4. The other end of the input winding Tr2a is connected to the negative electrode of the full-wave rectifier 2 via the emitter and collector of the transistor Q5. A parallel circuit of a constant voltage element Q6 and a capacitor C6 is connected to the input winding Tr2a. Further, the inverter transformer Tr2 has a control winding Tr2c. One end of the control winding Tr2c is connected to the base of the transistor Q4 and the other end is connected to the base of the transistor Q5.
The base of the transistor Q5 is connected to the collector of the transistor Q3 via the resistor R7, and the base of the transistor Q5 is connected to the collector of the transistor Q3 via the resistor R8.

The output winding Tr2b of the inverter transformer Tr2 has one end connected to one end of the filament FL1 of the fluorescent lamp FL via the capacitor C7 and the other end connected to one end of the filament FL2 of the fluorescent lamp FL. The commercial AC power source E and the inverter circuit 4 are connected in parallel.

Further, the filament FL1 of the fluorescent lamp FL
A starter 11 also having a function as a timer and a starting capacitor C11 having a function as a resonance means are connected in parallel between the other end and the other end of the filament FL2. The thyristor Q11 is placed between the other end of the filament FL1 and the other end of the filament FL2 of the fluorescent lamp FL.
A series circuit of a diode D11 and a resistor R11 is connected between the cathode and the gate of the thyristor Q11, and the gate is connected to the connection point of the commercial AC power supply E and the inductor L1 via the diode D12. A capacitor C12 is connected in parallel with the resistor R11, and a diode D13 and a resistor R1 are connected in parallel with the capacitor C12.
A series circuit of 4 is connected, with diode D13 and resistor R1
The connection point of 4 is connected to the connection point of the resistors R12 and R13 via the capacitor C13 forming a time constant circuit, and the capacitor C14 is connected in parallel to the resistor R13.

Next, the operation of the above embodiment will be described.

When the commercial AC power supply E is not interrupted, the voltage of the primary winding Tr1a of the transformer Tr1 is set to the voltage set by the constant voltage element Z1 and the voltage of the primary winding Tr1a follows the polarity every time it reaches a predetermined value. Zener diode ZD1 or zener diode ZD2 is turned on to turn on triac Q1, and voltage is applied via inductor L1.

Since the capacitor C13 is not charged when the commercial AC power source E is turned on, the resistance R12 and the resistance C12 are
The voltage divided by R13 is applied to the gate of the thyristor Q11, the thyristor Q11 is turned on, the filament FL1 and the filament FL2 of the fluorescent lamp FL are short-circuited, and the filament FL1 and the filament FL2 of the fluorescent lamp FL are preheated. In this case, since the commercial AC power source E has a frequency of about 50 Hz or 60 Hz, almost no current flows through the capacitor C11.

When the capacitor C13 is charged in this state, the gate voltage of the thyristor Q11 is no longer applied, and the thyristor Q11 is turned off to start discharging between the filament FL1 and the filament FL2 of the fluorescent lamp FL. The lamp FL is started and lit.

On the other hand, the voltage is reduced by the transformer Tr1 and full-wave rectified by the full-wave rectifier 2, and the battery B is charged through the resistor R2, the diode D1 and the diode D2. Also, battery B
When the charging voltage is low, a charging current flows and a potential difference occurs in the resistor R2, so that the transistor Q2 is turned on and the light emitting diode LED1 emits light to indicate that charging is in progress. Then, when the charging of the battery B progresses and the current flowing through the resistor R2 becomes small and the potential difference of the resistor R3 decreases, the transistor Q2
Is turned off, the light emitting diode LED1 is turned off, and the battery B has been charged.

When the commercial AC power source E is in a non-power failure state, the capacitor C4 is charged, so that the base of the transistor Q3 is reverse-biased, the inverter circuit 4 is not supplied with power and does not operate, and light is emitted. diode
Since the LED12 does not emit light, the phototransistor PTr2 also keeps the off state.

When the commercial AC power supply E fails, the voltage of the primary winding Tr1a drops below a predetermined value, the zener diode ZD1 or zener diode ZD2 is in the reverse blocking state, and the triac Q1 remains off. No power is supplied to the fluorescent lamp FL via L1.

Since the capacitor C4 is discharged and the reverse bias of the base of the transistor Q3 disappears, the DC power of the battery B is supplied to the inverter circuit 4, the inverter circuit 4 oscillates at high frequency, and the output winding Tr2b receives high frequency AC. To induce a high frequency.

When the battery B starts to discharge, the inverter circuit 4 and the starting capacitor C11 resonate, preheat the filaments FL1 and FL2, and then start discharging between the filaments FL1 and FL2 to start the fluorescent lamp FL. Turn on the light. In addition, when outputting from the inverter circuit 4, since it is a high frequency,
Almost no current flows into the starter 11, and most flows through the starting capacitor C11.

According to the above embodiment, the filament FL
Since it is not necessary to provide a filament winding for preheating 1 and FL2, even if the filaments FL1 and FL2 are short-circuited, no short-circuit current will flow.

When the commercial AC power source E is used, the starter 11 starts the engine, and when the inverter circuit 4 is used, the starting capacitor C11 starts the engine. Therefore, the startup can be performed in the most appropriate state.

Further, the parallel circuit of the commercial AC power source E and the inverter circuit 4 is connected to the filaments FL1 and FL2, respectively.
Connect to one end side of the starter 11 and starting capacitor
Since the parallel circuit of C11 is connected to the other ends of the filaments FL1 and FL2, the wiring can be reduced and simplified, and malfunctions due to noise can be prevented, and the size can be reduced.

Next, another embodiment will be described with reference to FIG.

In this embodiment, the emitter and collector of a transistor Q16 as switching means are connected between the filaments FL1 and FL2 of the fluorescent lamp FL in the embodiment shown in FIG. 1, and the timer 16 is connected to the base of the transistor Q16. Connect.

When the commercial AC power supply E and the inverter circuit 4 are started, the transistor Q16 is turned on for the optimum time for the commercial AC power supply E or the inverter circuit 4 to short-circuit the filaments FL1 and FL2 of the fluorescent lamp FL. Preheat filaments FL1 and FL2 and light them for starting.

The ON time of the transistor Q16 may be different when the fluorescent lamp FL is started by the commercial AC power source E and when the fluorescent lamp FL is started by the inverter circuit 4, or at the same time. You may set it.

In the embodiment shown in FIG. 2, too,
The same effect as the embodiment shown in FIG. 1 can be obtained.

[0045]

According to the emergency lighting device of the first aspect, the normal lighting circuit and the inverter circuit are connected in parallel to one end side of each of the pair of filaments of the discharge lamp, and each of the pair of filaments of the discharge lamp is connected. Since the starter is connected in parallel to the other end of the filament, the wiring can be simplified by distributing the power supply source and the starter to the one end and the other end of the filament, respectively.

According to the emergency lighting device of the second aspect,
A starter that preheats the filament of the discharge lamp when starting with a commercial AC power source, and a starting capacitor that preheats the filament of the discharge lamp when starting with an inverter circuit, and a normal lighting circuit on one end side of each filament of the discharge lamp The inverter and the inverter circuit are connected in parallel, and the starter and the starting capacitor are connected in parallel to the other end of each of the pair of filaments of the discharge lamp. By distributing the parts used for starting the lamp to start the wiring, the wiring can be simplified, and the starter and the starting capacitor can be used to ensure the start corresponding to the starting of the normal lighting circuit and the inverter circuit.

According to the emergency lighting device of the third aspect,
Since the starter that preheats the filament of the discharge lamp by the timer at the time of starting by the normal lighting circuit and the resonance means that preheats the filament of the discharge lamp by resonance at the time of lighting by the inverter circuit are provided, each of the normal lighting circuit and the inverter circuit is started. Therefore, the starter and the starting capacitor can be used to ensure the start.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an embodiment of an emergency lighting device of the present invention.

FIG. 2 is a circuit diagram showing another embodiment of the above.

FIG. 3 is a circuit diagram showing a conventional emergency lighting device.

[Explanation of symbols]

 4 Inverter circuit 11 Starter having function as timer B Battery C11 Starting capacitor having function as resonance means E Commercial AC power supply FL Fluorescent lamp as discharge lamp FL1, FL2 Filament L Inductor as normal lighting circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Sakata 6-78 Minamimachi, Mishima City, Shizuoka Prefecture Tech Mishima Factory

Claims (3)

[Claims] 1. A power failure and a non-power failure of the commercial AC power supply are detected, and when the commercial AC power supply is not in a power failure, the power from the commercial AC power supply is supplied through a normal lighting circuit and the commercial AC power supply drives a battery. In an emergency lighting device that charges and discharges a direct current from the battery by an inverter circuit at the time of a power failure of the commercial alternating-current power source and lights a discharge lamp having a pair of filaments after preheating the filaments by a starter, the discharge The normal lighting circuit and the inverter circuit are connected in parallel to one end side of each of the pair of filaments of the lamp, and the starter is connected in parallel to the other end side of each of the pair of filaments of the discharge lamp. Emergency lighting device. 2. A power failure and a non-power failure of the commercial AC power source are detected, and when the commercial AC power source is not in a power failure state, the power from the commercial AC power source is supplied through a normal lighting circuit and the commercial AC power source operates a battery. In an emergency lighting device for charging and for supplying direct current from the battery by converting the direct current from the battery by an inverter circuit at the time of power failure of the commercial alternating current power source, and preheating the filament after preheating the filament, the commercial alternating current power source A starter that preheats the filament of the discharge lamp at the time of starting by the inverter circuit, and a starting capacitor that preheats the filament of the discharge lamp at the time of starting by the inverter circuit, and the normal end is provided at one end of each of the pair of filaments of the discharge lamp. The lighting circuit and the inverter circuit are connected in parallel, Emergency lighting apparatus is characterized in that the respective other end of the pair of filaments flop was connected to the starter and starter capacitors in parallel. 3. A commercial AC power supply is detected for a power failure and a non-power failure, and when the commercial AC power supply is not in a power failure state, the power from the commercial AC power supply is supplied through a normal lighting circuit, and the commercial AC power supply drives a battery. In an emergency lighting device that charges and discharges a direct current from the battery by an inverter circuit at the time of a power failure of the commercial alternating-current power source, and lights a discharge lamp having a filament after preheating the filament, starting by the normal lighting circuit An emergency lighting device comprising: a starter for preheating the filament of the discharge lamp by a timer; and a resonance unit for preheating the filament of the discharge lamp by resonance when the inverter circuit is lit.