JPS58157083A - Emergency lamp circuit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention is in a storage battery used for a guiding light, etc. This relates to a type of emergency lighting circuit.

Conventionally, emergency lighting with a built-in storage battery, center guide light, etc., regulated by the Fire Service Act and the Building Standards Act, has been provided as shown in Figure 1. In the conventional example circuit shown in the figure, power is supplied from the commercial INAC during normal times, and the commercial ballast ill, or the choke C
A fluorescent lamp FL is turned on via H,. At this time, the relay RF is a dancer that passes through the coil. On the other hand, the charger section (2
) step-down transformer FT steps down the voltage in order to efficiently charge storage battery B, which has a terminal voltage of a low voltage of 3v to SOV (usually 4.5v to 15v), converts it to direct current with a diode DI, and limits the charging current. The storage battery B is constantly charged via the resistor R1 (trickle charging method), so that the storage battery B is always maintained in a fully charged state in preparation for an emergency. Next, in the event of a power outage, the coil current does not flow through some of the relays, so the contact rtgrzIri switches to NCK and cuts off the commercial lighting circuit.
1Q1% Ishibatato 5: /S OTX ballast capacitor C1, cocidence capacitor C which is the impedance for preheating current control! The flea light FL is connected to the inverter (3) consisting of the
I) is designed to oscillate and turn on in an emergency.

By the way, since the oil crisis, current energy-saving ideas have taken root, and people are starting to talk about the lashing costs of keeping the lights on all the time, and using power-saving commercial ballasts and extra charging when fully charged. It uses a power-saving charging method that does not supply electricity. As a result, inverter type ballasts are increasingly being used as commercial ballasts. The reason for this is that by lighting the fluorescent lamp FL at high frequency, it becomes a power-saving ballast by reducing cathode drop and improving luminous efficiency. Since the new standard for installation of lights and some emergency lighting equipment is to reduce electricity costs through power saving, it is necessary to install energy-saving guide lights and emergency lighting from construction '4@ and user equipment. There is a strong demand for equipment, but simply replacing a commercial ballast with an ishiverter type ballast would be expensive and large in size. Therefore, since the inverter is used both at all times and in emergencies, it is thought that if it were shared, it would be cheaper and the size would not increase. Based on this idea, as shown in FIG. 2, it is conceivable to share the commercial lighting with the emergency lighting s.

However, in this case, emergency lighting equipment and guide lights with built-in storage batteries exhibit a reverse charging phenomenon due to variations in storage capacity and lifespan, and there is a high risk of explosion due to abnormal heat generation and hydrogen release. Since nickel-cadmium storage batteries and sealed storage batteries are connected in series within 10 cells, the terminal voltage VB of storage battery B is significantly lower than the commercial power supply voltage VAC (VB << vmC).

For this reason, if the inverter (3) is shared with the emergency voltage VB as shown in Figure 2, the flea light FL will not turn on in an emergency because the output voltage to the inverter (3) is low, or even if it is turned on in an emergency, it will not work as expected. There is a problem that the brightness cannot be obtained, and the original function is not achieved or the expensive storage battery B is wasted.

As an improvement to this, it is possible to charge a number of storage batteries B in parallel during charging (1 group is 10 cells or less connected in series), and connect all groups in series during discharge to bring the overall voltage VB closer to VAc. In order to avoid the above-mentioned dangerous conditions caused by variations in the capacity of B and variations between cells at the end of their life, problems such as overcharging prevention, overdischarging prevention (reverse charging prevention), complexity of switching circuits during charging and discharging, etc. are required. Considering what will happen,
Disadvantages include a large number of parts, high cost, large size, and poor reliability. Therefore, as shown in Figure 2, inverters (3
) is found to be unsuitable for emergency lighting circuits with built-in storage batteries.

The present invention has been provided in view of the above-mentioned points, and the inverter section for commercial lighting and the inverter section for emergency lighting use a part in common to reduce cost and size and reduce power consumption. In compliance with the Building Standards Act and the Fire Service Act, this is an emergency light circuit used for emergency lighting devices with built-in storage batteries and guide lights with built-in storage batteries, and when one of the commercial lighting circuit parts or the emergency lighting circuit parts is in operation, the other It is an object of the present invention to provide an emergency light circuit which can prevent a part of the navel output from going around and causing inconvenience.

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

FIG. 3 shows a circuit according to an embodiment of the present invention, in which 11,
b#''i for preheating current limiting: 7 tactance, Di, D
s is a diode for preventing sneak current, a transistor forming the Qs-Q2u inverter (3), OTl is an inverter transformer, and this inverter transformer OTI
, m is the secondary coil, nf is the preheating coil, ru,
+n'll+nl! +n+a Primary coil is 1
This nll~In! The inverter circuit during commercial lighting is constructed using the entire Ill.
An inverter circuit during emergency lighting is configured using a part of the 12 secondary coils. In addition, Dl-D4 is a diode bridge, L is a transistor for limiting the peak of the transient collector current, and QteQz is a transistor for the inverter, and the inverter (3) may have any circuit type. , Iran Zista Q1. Q! The base may be controlled by either a self-excited type or a separately excited type, but the base signal during emergency or commercial use must be configured so that it is not affected by input from the circuit during diversion or emergency. ing. Further, in the figure, FL is a fluorescent lamp, B is a storage battery, and C is a ballast for current limiting the fluorescent lamp FL. (4) is a non-contact switching section, which is a transfer resistor Q3. Q4, resistance Rs - Rs,
Photo coupler pc.

Tyode D7, Konjishisa Co '4! When there is voltage in the commercial power supply AC, transistor Q3
When the commercial power supply AC is turned off and there is no voltage, 7
K is instructed to turn on resistor Q3 and shift to emergency lighting.

Thus, in the embodiment circuit shown in FIG. 3, the commercial power supply AC is diode-pulled during normal operation. ; Rectified by D1 to D4 and used as a DC power supply for inverter transmission OT+ and door transistor QIIQ! The inverter circuit for commercial lighting, consisting of choke L, is transistor Q.

, Q2 are oscillated by base signal control. The output of the inverter transformer:/SOTs is the winding n, 'K Vdc-n
A voltage of */(nlr1111+) is generated, and using this as a power source, the fluorescent lamp FL is lit via the ballast OH. On the other hand, storage battery B is charged using commercial power AC as input! f6)
K is being charged. Furthermore, the non-contact switching unit (4) converts the commercial power AC into DC using the diode D1, smoothes it using the electrolytic NiJ capacitor Co, and flows the limited current through the resistor R5 to the light emitting side of the photocoupler PC to emit light. Turn on the light-receiving side of the coupler PC, bypass the base current of transistor Q4, and complete this trannia! The storage battery B operates to supply power to the inverter transformer OTl by turning off the transistor Q4 and turning off the transistor Q3. Next, in the event of an emergency, the commercial power supply AC is cut off, so the light emitting part of the photo cup 5PC does not emit light in the non-contact switching 11f41, its light receiving part remains off, and the base current of transistor q flows, which turns on the transistor 1. Q3 is turned on and emergency power from storage battery B is supplied to inverter transmission OT1. As shown here, the primary winding at this time is r14! and n1! using VB”n
Electricity 1 of */Ilu is generated n, lc, and lights up the fluorescent lamp PL via the ballast CH. At this time, VB-ng/Hu
The voltage is predetermined at a predetermined value by the VB in consideration of the brightness in an emergency so that the voltage can be started and maintained at a predetermined value. On the other hand, in the non-M state, a voltage also occurs in the windings no + no K due to the oscillation operation of the inverter transformer OTl. This fermentation power source is a diode Ds = Da
If there is no such current, it will flow as a circulating current as shown by the dashed line in FIG. 4, as if the winding nil + nu' constitutes a short circuit, causing a large current to flow and interfering with the emergency lighting operation. Therefore, the diodes Ds and Ds are inserted round to prevent circulating current in order to avoid the above-mentioned trouble.

FIG. 5 shows another embodiment of the present invention, in which a charging power source is taken from the middle of the inverter transmission OT+ and a predetermined charging current is supplied to the storage battery BK using a diode (diode) and a resistor R6. In this way, the 411 can be easily constructed without having to take the trouble to separately provide the charger (6) with a truss system or the like. In addition, Ry in Fig. 5 is a relay for power failure detection, and the contact r of this relay & connects the storage battery B to the charger (b) @ and the diode) and the anode side of D6.
Contact r3 is the NO contact on the side connected to the charger (6), and during commercial lighting, the battery B is charged with the output of the charger (6), and during a power outage, the output of the charger (6) is connected to the diode (diode) and via the DI. In this case, the inverter (3) is operated.

Since the present invention is configured as described above, the main circuit components of the inverter for emergency and commercial use can be saved even though the inverter is turned on during commercial lighting to save power. Since all of the storage battery is shared, the cost is low and it is possible to reduce the size.In addition, one end of the storage battery is connected via a diode to prevent crosstalk , #A, there is no current loss due to injection, and the lighting can be performed with good power efficiency.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of a conventional example, Fig. 2 is a block diagram of another conventional example, Fig. 3 is a circuit diagram of a first embodiment of the present invention, and Fig. 4 is an essential part for explaining the same circuit. FIG. 5 is a circuit diagram of another embodiment of the present invention, in which B is a storage battery, OTl is an ishiverter transformer, and Di-Ds are diodes. Agent Patent Attorney Ishi 1) Written amendment to the 7th procedure (spontaneous) May 28, 1980 To the Commissioner of the Japan Patent Office 1, Indication of the case 1957 Patent Meng No. 1025 2, Name of sound #Electric light circuit 3. Relationship with the case of the person making the amendment Address of special liver applicant 1048 Oaza Kadoma, Kadoma City, Osaka Name (583) Matsushita Electric Works Co., Ltd. Representative Iku Kobayashi 4 Agent postal code 530 5 Amendment order Voluntary correction of the date The entire text of Yuensho No. Special II Shou 57-41025 No. 1, Hon-yoshogi No. 6, 1st ÷ line is corrected as follows. r flH@n'll j ntt e n#l
are the primary coils, and these n u, ~ n'1. 2. Correct ``Irasisister'' in the 7th true second column of the same page to ``Transistor''. 3. “VBII
B” to “Vn and inverter transformer OTl winding woman agent patent attorney Ro 1) Husband 7

Claims (1)

[Claims] (1) A storage device with a terminal voltage considerably lower than the power supply voltage.
In an emergency light circuit with a built-in battery, it may go off when the commercial light is turned on.
When all of the primary coils are used, the circuit section of the inverter including the inverter transformer is configured so that part of the primary coil is used during emergency lighting due to the output of the storage battery. An emergency lighting circuit characterized in that it is commonly used for commercial lighting and emergency lighting. (Recited in claim 1), wherein one end of the storage battery is connected to the 91 pairs of intermediate taps of the primary coil of the inverter transformer via a diode for preventing sinking. emergency light circuit.