JPH02172183A - emergency light lighting device - Google Patents

Abstract

PURPOSE:To prevent ill influence upon the lifetime of a mechanical contact by changing over an emergency lighting control switch from On to Off when the AC mains are recovered, changing over a lamp changeover switch from an emergency inverter circuit to a commercial inverter circuit, and then changing over a commercial lighting control switch from Off to On. CONSTITUTION:When power failure on AC mains is recovered, an emergency lighting control switch S3 is changed over from On to Off, and current supply from the emergency power supply to an emergency inverter circuit IN2 is stopped to cause stopping of its oscillation, and the emergency lighting of lamp is finished. After a certain while, a lamp changeover switch S2 is changed over from the emergency inverter circuit IN2 side to the commercial inverter circuit IN1. At this time, the oscillating motion of the inverter circuit IN2 is stopped already, and current supply to the commercial inverter circuit IN1 has not yet begun, and this remains out of oscillation. Therefore no contact arc will be generated even though changing-over of a chattering switch S2 has caused chattering at the time of changing-over of the lamp changeover switch S2.

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.

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. Traditionally known emergency light lighting devices are
In the event of a commercial power outage, the voltage from the emergency power supply is converted to a high-frequency voltage and applied to the discharge lamp, but when the commercial power is on, a steel discharge lamp ballast is used to light the discharge lamp at the commercial frequency. was the best.

Therefore, by taking advantage of the advantages of commercial impark 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 M of the smoothing capacitor included in the commercial inverter circuit
The 7359 load causes the commercial inverter circuit to continue oscillating for a while, during which time the lamp changeover switch consisting of mechanical contacts 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 has sufficiently decreased after a commercial power outage. This is to delay the processing for a predetermined period of time.

[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).
When the lamp changeover switch switches the lamp from the emergency inverter circuit to the commercial inverter circuit, a delay circuit also works during this switching operation, and when the lamp changeover switch performs the switching operation, the commercial inverter circuit is already oscillating. This means that you have started. 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 contact when switching the lamp from the emergency impark circuit to the commercial inverter circuit using the R contact when the power is restored to the commercial TL source. It is to provide.

[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 addition, a commercial lighting control switch that controls the operation of the commercial inverter circuit and an emergency lighting control switch that controls the operation of the emergency inverter circuit are provided, and a lamp switching switch that switches and connects the lamp between the commercial inverter circuit and the emergency inverter circuit is provided. A switch is provided. 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, then the lamp changeover switch is switched from the emergency inverter circuit side to the commercial inverter circuit side, and then the commercial lighting control switch is switched from off to on. A circuit is installed.

[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.

At this time, the oscillation operation of the emergency inverter circuit has already stopped, power supply to the commercial impark circuit has not yet started, and the commercial inverter circuit is not oscillating. Therefore, chattering occurs when the lamp changeover switch is switched. Even if this occurs, contact arcing will not occur, and the life of the lamp changeover switch contacts will not be adversely affected.

Next, the commercial lighting control switch is switched from OFF to ON, power supply from the commercial power source to the commercial inverter circuit is started, oscillation of the commercial inverter circuit is started, and the lamp is lit for commercial use.

〔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 an 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 N2 for converting the voltage of this emergency type 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 addition, a commercial lighting control switch SI that controls the operation of the commercial inverter circuit IN is inserted between the commercial type BAc and the commercial inverter circuit IN, and the emergency inverter circuit IN is inserted between the commercial type BAc and the commercial inverter circuit IN.
2, an emergency lighting control switch S3 is inserted between the emergency power supply B and the emergency impark circuit IN2,
A lamp changeover switch s that switches and connects the lamp LP to the commercial inverter circuit IN and the emergency inverter circuit IN2.
2 are provided. In this case, the lamp changeover switch s2 consists of m-mechanical contacts such as mechanical relay contacts, and the normally open terminal is connected to the commercial inverter circuit IN, side, the normally closed terminal is connected to the emergency inverter circuit IN2 side, and the common The terminals are connected to lamps ■ and P.

Furthermore, a power outage detection port *T that detects a commercial type 1Ac power outage
K, and a commercial lighting control switch S9. A switching control circuit SC is provided to control the lamp changeover switch S2 and the emergency lighting control switch S3.

In this case, according to the output of the power outage detection circuit TK, the switching control circuit SC first switches the commercial lighting control switch S1 from on to off at the time of a power outage of the commercial power supply AC, and then, after a predetermined period of time has elapsed, switches the lamp changeover switch S2 to the commercial inverter. Switch from the circuit IN side to the emergency inverter circuit IN2 side, then turn on the emergency lighting system? 21 Switch S3 from off to on.

In addition, when the commercial power supply AC is restored, first switch the emergency lighting control switch S3 from on to off, then switch the lamp changeover switch s2 from the emergency inverter circuit IN2 side to the commercial inverter circuit IN side, and then switch the commercial lighting control switch Switch sl from off to on.

Next, the operation of this emergency light lighting device will be explained with reference to FIG. In FIG. 2, +a+ indicates the state of the commercial power supply AC, fbl indicates the state of the commercial lighting control switch S1, (C1 indicates the state of the lamp changeover switch s2,
(d+ indicates the state of the emergency lighting control switch s3.

In this emergency light lighting device, when a commercial BAc power outage occurs, a switching control circuit SC based on the output of a power outage detection circuit TK
Under the control of , it operates like ggi.

When a power outage occurs in the commercial HAc at time t1 as shown in Figure 2 fa), the commercial lighting control switch S immediately switches from on to off as shown in Figure 2 fa), and the commercial power supply AC and the commercial inverter circuit IN switch off. is separated. 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).

Next, at time [2] when a predetermined period of time has elapsed after the power outage of the commercial gAc (more than the duration of oscillation of the commercial inverter circuit IN), the lamp changeover switch S2 is switched to the position shown in FIG.
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 inverter 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 S2, contact arcing will not occur and the life of the contacts of the lamp changeover switch S2 will not be adversely affected. That is, the lamp changeover switch S2 can be protected.

Then, for a predetermined period of time from time t2 (lamp changeover switch S
At time t3, after the chattering duration of 2) has elapsed, the emergency lighting control switch S3 is switched from OFF to ON as shown in FIG. The inverter circuit 1N2 starts to oscillate, and the lamp LP is turned on in an emergency. At this time, there is a (13-12) time delay and the operation of the emergency inverter circuit IN2 is not started immediately, so even if some chattering occurs when switching the lamp changeover switch S2, this chattering period During the operation, the output of the emergency inverter circuit IN2 is not applied to the lamp changeover switch S2, and the output of the emergency inverter circuit IN2 is not applied to the lamp changeover switch S2.
It is possible to prevent the contact life of the lamp changeover switch S2 from being shortened due to the chattering of the lamp changeover switch S2.

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

At time t4, as shown in Figure 2 fal, the commercial power supply AC
When the power is restored, the emergency lighting control switch S3 immediately switches to the second
As shown in Figure fdl, the power is switched from on to off, power supply from the emergency power supply B to the emergency inverter circuit IN2 is stopped, the oscillation of the emergency inverter circuit IN2 is stopped, and the emergency lighting of the lamp LP is ended.

Then, at time t5, when a predetermined period of time has elapsed from time t4, the lamp changeover switch S2 switches from the normally closed terminal side to the normally open terminal side as shown in FIG. At this time, the oscillation operation of the emergency inverter circuit IN2 has already stopped, power supply to the commercial inverter circuit IN has not yet started, and the commercial inverter circuit N1 is not oscillating. Changeover switch S2
Even if chattering occurs during the switching operation, contact arcing will not occur and the life of the contacts of the lamp changeover switch S2 will not be adversely affected.

Then, at time [6] after a predetermined period of time has elapsed from time 11s and the lamp changeover switch S2 has been reliably switched, the commercial lighting control switch S1 is switched from off to on as shown in tb+ in FIG. Power supply to the inverter circuit IN is started, oscillation of the commercial inverter circuit IN is started, and the lamp LP is turned on for commercial use.

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

In the emergency light lighting device shown in FIG. 3, a commercial type fAAC is connected to a commercial inverter circuit IN via a commercial lighting control switch S1, a choke coil CH constituting a noise prevention filter, and a capacitor C2.

This commercial inverter circuit IN includes a full-wave rectifier RE and a full-wave rectifier R for full-wave rectifying the voltage of a commercial TL source AC.
It consists of a rectifying and smoothing section consisting of a capacitor C2 that smoothes the output of E, and an inverter circuit main body section that changes the voltage obtained across the capacitor C2 to a high frequency voltage, and when the commercial lighting control switch S1 is turned on, Start operation.

In this case, the inverter circuit main body is a well-known self-excited two-stone push-pull inverter circuit, which includes oscillation transistors Q, Q2, a resonance capacitor C3, a leakage type oscillation transformer T1, and a constant current choke coil CH2 and Heath resistance R2 of transistors Q, Q2.
, R3, a starting resistor R1, an oscillation transformer T, a base power supply diode D that rectifies a part of the induced voltage, a capacitor C4, and capacitors C, , C6 provided on the secondary side of the oscillation transformer T1. Consisting of Since the operation of this circuit is well known, a description thereof will be omitted.

A lamp LP is connected to the output end of the commercial inverter circuit IN through a normally open terminal and a common terminal of lamp changeover switches s21 and S22, which are comprised of relay contacts.

In addition, this emergency light lighting device is an emergency type fAB in which a full-wave rectifier 23RE2 is connected to a commercial type 111Ac via a step-down transformer T3, and a charging resistor R9 and a diode D2 are connected from the output side of the full-wave rectifier RE2. Charging the storage battery.

An emergency inverter circuit IN2 is connected to the emergency power supply B via an emergency lighting control switch S3 consisting of a transistor Q5 and a resistor R8, and when the transistor Q5 is turned on, the emergency inverter circuit IN2
is activated.

This emergency inverter circuit IN2 is a well-known self-excited two-stone push-pull inverter circuit, similar to the commercial inverter circuit [Nl] described above, and has an oscillating transistor Q3.
．． Q, resonance capacitor C7, and oscillation transformer T
2, a constant current choke coil CH3, and a transistor Q3. Q.

, base resistors R, , R, , R6 and capacitors C, , C6 provided on the secondary side of the oscillation transformer T2, and when transistor Q5 is turned on, transistors Q3 . Q4
Supply of base current to the oscillator starts, and oscillation begins. 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 terminal and common terminal of the lamp changeover switch S2+=S22.

The power failure detection circuit TK includes a diode D7. Resistance RI3. It consists of R14 and capacitor C11. This power failure detection circuit TK has a configuration that divides, rectifies, and smoothes the pulsating voltage that appears on the output side of the full-wave rectifier n RE 2.
At time W, a predetermined voltage appears across the capacitor CI+, and 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 C11 is very small, it quickly falls and rises during a power outage and power restoration of the commercial BAc, and the time delay caused by the capacitor C11 can be almost ignored.

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

In this switching control circuit SC, RY is a mechanical relay having the commercial lighting control switch S1 as a relay contact, and RY2 is a lamp changeover switch S! l, s2! This is a mechanical relay RY2 having as a relay contact. Q7 and Q8 are transistors that control energization to the relays RY, RY, and Q8 is a transistor that turns on and off the transistor Q that constitutes the emergency lighting control switch S3. R7 is a resistor, and R3°, RI1, and RI2 are transistors Q8. Q7. This is the base resistance of Q6. NT, ~NT, is an inverting circuit, AN 1 , AN
2 is an AND circuit. RIs=R11=R
17 are resistors for setting delay time, CH, 'CI3, CI
4 is also a capacitor. C1゜is relay RY,...
Full-wave rectifier RE2 with a capacitor that serves as the operating power supply for RY2
It is charged from the emergency power source B through the diode D4, and is also charged from the emergency power source B through the diode D3. D5
．． D6 is a diode.

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

Before time t1, the source AC of commercial 1 is ill! The outputs of the inverting circuits NT, , NT3 are at a low level (hereinafter referred to as L), and the outputs of the inverting circuits NT2 and NT are at a high level (hereinafter referred to as 4).
Also, the output of the AND circuit AN is
The output of 2 is H. Therefore, when the transistor Q7 is turned on, a current is applied to the relay RY, and the commercial lighting control switch S1 is turned on. Furthermore, the transistor Q8 is off, and the transistor Q5 constituting the emergency lighting control switch S3 is off. Also, transistor Q6 is on, relay RY2 is energized, and lamp changeover switch S
□, S1. has been switched to the normally open terminal side.

When the commercial power supply AC fails at time [, the inverting circuit NT,
The output of NT2 changes from L to H, and therefore the inverting circuit NT2
The output of the AND circuit AN2 changes from H to L as shown in +al in FIG. 2, and the output of the AND circuit AN2 changes from H to L as shown in FIG. As a result, transistor Q7 turns off and relay I? The power supply to Y is stopped, and the commercial lighting control switch S is turned off.

After time t1, at time L2, when a predetermined time determined by the time constant of resistor R16 and capacitor c1° has elapsed, the output of inverting circuit NT3 changes from L to T, so that the output of inverting circuit NT becomes as shown in FIG. (Changes from H to L as in C1. As a result, transistor Q6 turns off, 1J1jijff to relay RY2 stops, and lamp changeover switches S□, S□ change from the normally open terminal side to the normally closed terminal side. Switch.

After time [2, at time [3] when a predetermined time determined by the time constant of resistor R11l and capacitor CI3 has elapsed, the output of the AND circuit AN changes from L to H.

As a result, the transistor Q8 is turned on, and the transistor Q5 forming the emergency lighting control switch S3 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 FIG. The output of the circuit AN changes from H to L.

As a result, transistor Q8 is turned off, and transistor Q5, which constitutes emergency lighting control switch S3, is turned off.

After time t4, the resistance Rts and the capacitor CI! At time [5] when a predetermined time determined by the time constant has elapsed, the output of the inverting circuit NT3 changes from H to L, and therefore the output of the inverting circuit NT4 changes from L to H as shown in FIG. As a result, the transistor Q6 turns on and starts energizing the relay RY2, and the lamp changeover switches S□, S
□ switches from the normally closed terminal side to the normally closed terminal side.

After time L5, at time L6 when a predetermined time determined by the time constant of resistor RI7 and capacitor CI4 has elapsed, the output of AND circuit AN2 changes from L to H, and transistor Q7
is turned on, energization to relay RY is started, and commercial lighting control switch S1 is turned on.

In the embodiment shown in FIGS. 1 to 3, the commercial lighting control switch, Sochi S8. Although a predetermined delay time was provided between each switching timing of the lamp changeover switch S2 and the emergency lighting control lII switch S3, when the commercial power [AC] is restored, the commercial lighting side i'fa switch S1. The lamp changeover switch S2 and the emergency lighting control switch S3 are substantially the emergency lighting control switch S3; off-lighting control switch S2; normally open terminal side-commercial lighting control switch S2;
,;On.The magnitude of the delay time and its configuration means are not the constituent elements of the present invention.For example, in the explanation of the circuit operation in FIG. 3, at time L4, , by turning off the transistor Q8, the transistor Q5 is turned off and the operation of the emergency inverter circuit IN2 is stopped, and at time [5], which is a predetermined time later than the time t4, the transistor Q6 is turned on and the relay RY2 is energized. and lamp changeover switch 521=S2
2 is switched to the normally open terminal side, however, the transistor Q8 may be turned off and the transistor Q6 turned on at the same time at time L4. The reason for this is that the transistor Q5 that constitutes the emergency lighting control switch S3 turns off almost simultaneously with the turning off of the transistor Q8, but the lamp changeover switch S! 1=sffi! This is because the off-timing of the transistor Q5 is substantially delayed due to the delay in the operation of the relay RY2 (several m5ec).

Further, the commercial lighting control switch S1 and the emergency lighting control switch S3 are connected to the commercial impark circuit IN.

It is only necessary to be able to substantially control the operations of the emergency inverter circuit IN2 and the emergency inverter circuit IN2, and the configuration thereof is as shown in FIGS. 1 to 3.
The present invention is not limited to the illustrated embodiment, and may have any configuration.

〔Effect of the invention〕

According to the emergency light lighting device of the present invention, the commercial lighting control switch that controls the operation of the commercial inverter circuit, the emergency lighting control switch that controls the operation of the emergency inverter circuit, and the lamp are connected to the commercial inverter circuit and the emergency inverter circuit. A lamp changeover switch that is connected to the circuit is provided, and these switches are controlled by a changeover control circuit to switch the emergency lighting control switch from on to off when commercial power is restored.
Next, the lamp changeover switch was switched from the emergency inverter circuit side to the commercial inverter circuit side, and then the commercial lighting control switch was switched from off to on, so both the emergency inverter circuit and the commercial inverter circuit stopped operating. The lamp changeover switch can be operated in the state where the lamp is in use, and when the lamp is switched from the emergency inverter circuit to the commercial inverter circuit using the weaving contacts, this prevents the contact life from being adversely affected when the commercial power is restored. be able to.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the configuration of an emergency light lighting device according to an embodiment of the present invention, Fig. 2 is a time chart showing the operation of Fig. 1, and Fig. 3 is a specific circuit configuration of the circuit block of Fig. 1. FIG. AC...Commercial power supply, B...Emergency power supply, INl...
・Commercial inverter circuit, IN2...Emergency impark circuit, LP...Lamp, TK...Power failure detection circuit, S
C...Switching control circuit, S...Commercial lighting control switch, S2...Lamp changeover switch, S3...Emergency lighting control switch TK AC...Commercial source B...#Hanging power supply Sl ...Commercial, ☆, 11 Suppressing switch S2...Lamp cutting switch S3...#Usually, light ν effect switch Fig. 1

Claims (1)

[Claims] a lamp for both commercial lighting and emergency lighting; a commercial inverter circuit that converts the voltage of a commercial power source into a high-frequency voltage and supplies it to the lamp to turn the lamp on for commercial use;
an emergency power source, an emergency inverter circuit that converts the voltage of the emergency power source into a high-frequency voltage and supplies it to the lamp to emergencyly light the lamp; and a commercial lighting control switch that controls the operation of the commercial inverter circuit. an emergency lighting control switch that controls the operation of the emergency inverter circuit; a lamp changeover switch that selectively connects the lamp to the commercial inverter circuit and the emergency inverter circuit; and an emergency lighting control switch that controls the operation of the emergency inverter circuit; An emergency light comprising a switching control circuit that switches a control switch from on to off, then switches the lamp changeover switch from the emergency inverter circuit side to the commercial inverter circuit side, and then switches the commercial lighting control switch from off to on. lighting device.