KR920000458B1 - Emergency lighting device - Google Patents

Abstract

The apparatus lights emergency lamps by connecting the lamps to a rechargeable battery only on a power failure, and the apparatus includes: a main power circuit for receiving power from a transformer; a constant voltage circuit for receiving power from the main power circuit to charge the rechargeable battery; an auxiliary power circuit for supplying an operation power on a power failure; a logic circuit for receiving power from the auxiliary power circuit, and for turning on the gate of an SCR on a power failure; and a power sensing circuit consisting of a power switch, a voltage divider and a capacitor, and for outputting the power to the logic circuit by detecting the power level from the capacitor on a power failure.

Description

Emergency lighting device of lighting

Figure is a circuit diagram showing an embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

1,2: logic circuit C _S , C ₃ : condenser

D ₃ : Diode FL: Fluorescent Lamp

INV: Inverter LT: Latch Circuit

NCB: Rechargeable Battery P ₁ , P ₃ : Power Supply Terminal

Q ₁ : Transistor Rs: High Resistance

R ₁ , R ₂ , R ₃ , R ₄ : Resistor RET ₁ , RET ₂ , RET ₃ : Rectifier Circuit

T ₁ : Trans TH: SCR

SW ₁ : switch

The present invention relates to an emergency lighting device such as a lamp such that the lamp can be turned on by the power of the battery only when a power failure occurs when the lamp is turned on and off.

In general, the uninterruptible power supply that is widely used is usually input power to various loads such as electric lamps, heaters, or motors by relay contacts, and in case of power failure, the emergency contact generator operates by supplying power by switching the relay contacts. Power was supplied by the power supply facility.

Therefore, if you have such an uninterruptible power supply, you have to carry out extensive electric work and also need large capacity power generation equipment, large capacity battery and inverter system to obtain high voltage AC power. do. Therefore, there is a problem that the economic burden becomes heavy.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide an emergency lighting device such as a lighting lamp that can be turned on by a battery having a small amount of static electricity.

In order to achieve the above object, the present invention in the emergency lighting device, such as a lamp for lighting the lamp by the power of the rechargeable battery at the time of power failure, the power supply from the main power circuit portion to supply the power through the transformer, the rechargeable battery Receiving constant voltage circuit part, sub-power circuit part with smoothing capacitor to supply power for operation in case of power failure, logic circuit part to turn on SCR's gate in case of power failure by receiving power from sub-power circuit part, power switch, voltage distribution resistor and capacitor And a power supply sensing circuit section that detects the potential at the time of power failure and outputs it to the logic circuit section. When the SCR is turned on, DC power is supplied from the rechargeable battery to the inverter to turn on the fluorescent lamp.

Therefore, according to the present invention, at the time of power failure, the illumination lamp can be turned on by the emergency lighting device provided in the existing lighting device without having to provide a separate emergency lighting device.

The above and other objects and novel features of the present invention will become apparent from the description and the accompanying drawings.

Hereinafter, the structure of this invention is demonstrated with an Example.

In the figure, (a) is a main power circuit portion consisting of a secondary winding (L ₂ ), a rectifier (RET ₁ ) and a smoothing capacitor (C ₁ ) of a transformer (T ₁ ), (b) converts DC into AC The inverter section (FL) is a fluorescent lamp. (C) is a constant voltage circuit portion consisting of a transistor (Q ₁ ), a diode (D ₁ , D ₂ ) and a resistor (R ₆ ), (D) is another secondary winding (L ₃ ) of the transformer (T ₁ ), It is a negative power supply circuit section composed of a rectifier (RET ₃ ) and a smoothing capacitor (C ₃ ). (E) is a logic circuit part composed of a two-input NAND gate IC, and (f) is a power switch (SW ₁ ), a voltage distribution resistor (R ₁ , R ₂ ), a rectifier (REF ₂ ) and a capacitor (C ₄ ) The potential sensing circuit section. The output of this potential sensing circuit part (bar) is detected at both ends of the capacitor (C ₄ ).

Hereinafter, the circuit configuration and operation of the present invention will be described in more detail.

In the potential sensing circuit section (bar), when the current switch is “ON” and the power is normally input, the power supply passes through the switch SW ₁ to connect the primary winding L ₁ of the transformer T ₁ . As a result, a predetermined alternating voltage is induced in the secondary winding L ₂ .

After the rectification circuit (RET ₁ ) of the main power circuit unit (A) is rectified, it is smoothed in the capacitor (C ₁ ) and directly applied to the inverter (INV) through the diode (D ₃ ), the inverter (INV) is oscillating it By changing the voltage, the fluorescent lamp FL is turned on to enable normal lighting. At the same time, it is rectified in the main power circuit (a) a rectifier circuit (RET ₁₎ of the capacitor (C _1), a diode (D _1), through (D _2), a resistance (R ₆ of the DC voltage is a constant voltage circuit portion (C) smoothing in ), so the flow, the base potential of the transistor (Q ₁₎ is lower than the potential of the emitter that is supplied by a resistance (R _5), the transistor (Q ₁₎ is turned on (Turn on).

At this time, since the transistor Q ₁ operates in the active region, the amount of current flowing through the transistor Q ₁ is controlled by adjusting the size of the resistor R ₅ , so that the rechargeable battery NCB of nickel cadmium is smoothly provided. Is charged.

On the other hand, the rectifier circuit RE _{3 of the} secondary power supply circuit unit D also rectifies the voltage of the secondary winding L ₃ and passes through the resistors R ₃ and R _{4 of} the capacitor C ₃ and the logic circuit unit e. A high level signal (hereinafter referred to as "H" signal) is applied to the logic circuit 1. At the same time, an AC voltage is also applied to the resistors R ₁ and R ₂ of the power sensing circuit part (bar) and rectified by the rectifying circuit RET ₂ , and then connected to the input of the logic circuit 2 via the capacitor C ₄ . H ”signal is applied. The output of the logic circuit 2 becomes a low level signal (hereinafter referred to as an "L" signal), and the input of the logic circuit 1 also becomes an "L" signal state. Therefore, the output of the latch circuit LT is in the "L" signal state, and the "L" signal is applied to the gate of the SCR (TH). As described above, the fluorescent lamp FL is turned on and the storage battery NCB is charged as SCR (TH) remains turned off.

In this state, when the user “offs” the switch SW ₁ for extinguishing, there is no current flowing in the primary winding L ₁ of the transformer T ₁ . Therefore, the secondary windings L ₂ and L ₃ of the transformer T ₁ have no induced voltage, are rectified by the rectifying circuit RET ₁ of the main power supply circuit unit, and the diode D ₃ is disconnected. Since there is no input voltage to the inverter INV supplied through the fluorescent lamp FL, the fluorescent lamp FL is turned off. In addition, since the voltage applied to the emitter and the base of the transistor Q ₁ of the constant voltage circuit section (C) also drops immediately, the transistor Q ₁ is also turned off. Further, the DC voltage also loss of the release provided by the rectifier circuit (RET ₃₎ of the sub-power circuit portion (D) a condenser (C ₃₎ is not the voltage to be more charged, the capacitor (C ₃₎ and connected to the logic circuit (E) The cathode (R ₃ , R ₄ ), logic circuit (1), latch circuit (LT), and cathode side of rectifier circuit (RET ₃ ) are all in high impedance state, and thus fine discharge is performed for a considerable time to charge capacitor C ₃ . It can be maintained. On the other hand, at present, the power is turned off according to the user's intention, not the power failure. Therefore, even if the switch SW ₁ is turned off, the AC voltage supplied from the capacitor Cs or the high resistance Rs is the resistance R ₁ and R _{2 as it is.} It is supplied through Therefore, after rectifying in the rectifying circuit RET and smoothing in the condenser C ₄ , it is applied to the logic circuit 2 as an "H" signal voltage. Therefore, the output of the logic circuit 2 is in the "L" signal state, and the input of the logic circuit 1 is in the "L" signal state.

Therefore, the output of the logic circuit 1 continues to be in the "H" signal state, the output of the latch circuit LT is in the "L" signal state, and the "L" signal is continuously applied to the gate of the SCR (TH). Therefore, the fluorescent lamp FL in which the turn-off state is maintained remains off, and this state is maintained because the input of the logic circuit 1 is in the "L" signal state even after the discharge of the capacitor C ₃ is completed. A case where a power failure occurs in a normal use state will be described. That is, when the power supply is cut off while the switch SW ₁ is “ON”, both currents flowing in the primary winding L ₁ and the secondary winding L ₂ and L ₃ of the transformer T ₁ are both present. The input voltage to the inverter INV, which is lost and rectified by the rectifier circuit RET ₁ of the main power circuit unit A, is supplied through the diode D ₃ . In addition, since the voltage applied to the emitter and the base of the transistor Q ₁ of the constant voltage circuit section C is also immediately dropped, the transistor Q ₁ is also turned off, and the rectifier circuit RET ₃ of the sub power supply circuit section D is turned on. The DC voltage supplied by the battery is also lost so that the capacitor C ₃ is no longer charged. Thus, the capacitor because both (C ₃₎ and is connected to the resistance (R _3, R _4), the logic circuit 1, a latch circuit (LT) and the cathode including a rectifying circuit (RET ₃₎ a high impedance state, the capacitor (C ₃ ) Can maintain a minute discharge for a considerable time.

In addition, since there is no power supply at both ends of the switch SW ₁ as well as the power supply terminals P ₁ and P ₂ because of the power failure state, no current can flow through the resistors R ₁ and R ₂ , and the rectifier circuit Even in (RET ₂ ), no current flows, and the rectified voltage is lost. Therefore, the input of the logic circuit 2 is in the "L" signal state, the output thereof is in the "H" signal state, and finally the "H" signal is input to the input of the logic circuit 1, and the output of the latch LT is output. "H" signal is output. Since this output signal is applied to the gate of SCR (TH) to turn on the SCR (TH), the current of the rechargeable battery NCB is applied to the inverter INV so that the fluorescent lamp FL is normalized and the emergency lighting function in case of power failure is performed. Exert. The continuous discharge of nickel cadmium rechargeable battery (NCB) should be time-limited, so as not to shorten the lifespan caused by over discharge. Therefore, it is necessary to adjust the oscillation voltage of inverter (INV) appropriately and to continuously operate the fluorescent lamp (FL) in emergency. The lighting time can be set arbitrarily.

Next, the case where the power failure is restored during the emergency lighting will be described. In this case, the power supply flows to the primary winding L ₁ of the transformer T ₁ through the switch SW ₁ of the power sensing circuit part bar, and the power is induced to the secondary windings L ₂ and L ₃ . In the rectifier circuits RET ₁ and RET ₃ , the rectified DC voltage is generated and supplied to the inverter INV through the diode D ₃ , so that the fluorescent lamp FL is turned on normally. At this time, since the output voltage of the rectifying circuit RET ₁ is almost applied to the casing of the SCR (TH), the anode potential of the SCR (TH) to which the voltage of the rechargeable battery NCB whose maximum charging voltage is less than that is applied is the cathode. Lower than the potential of SCR (TH) is turned off immediately. In addition, since the output voltage of the main power circuit portion A flows through the diodes D ₁ and D ₂ and the resistor R ₆ of the constant voltage circuit portion C, the base potential of the transistor Q ₁ is lower than that of the emitter so that the transistor Q ₁ is turned off.

As a result, the rechargeable battery NCB is charged again, and the output voltage of the rectifying circuit RET ₃ of the secondary power supply circuit unit D charges the capacitor C ₃ again so that the resistance R ₃ of the logic circuit unit E is obtained. The signal voltage "H" is applied to the logic circuit 1 and the latch LT through R ₄ .

In this case, the voltage supplied from the resistors R ₁ and R ₂ is rectified and then output to the rectification circuit RET ₂ of the power sensing circuit part (bar), and smoothed in the capacitor C ₄ , and then the logic circuit 2 is input. Is applied as the “H” signal. Therefore, the "L" signal is input to the input terminal of the logic circuit 1, the "H" signal is generated at the output terminal thereof, and the "L" signal is output from the output of the latch signal LT, so that the SCR (TH) Will continue to turn off. Therefore, it is possible to return to the state in which the fluorescent lamp FL is restored to the normal power supply.

In this way, the present invention can be turned on according to the user's intention even in the event of power failure.

Since the present invention is integrated into the existing lighting fixtures, there is no need to install a separate large-capacity emergency power supply device, which is very convenient and has the advantage that the burden of facility cost is reduced, and additionally, the maintenance cost of the large-capacity emergency lighting device is separately spent. There is a huge economic effect that does not have to be done.

In addition, the charging current consumption is only enough to charge the number of rechargeable batteries that can turn on only the selected lamp in an emergency, so that it is possible to reduce the total power consumption, which is even more economic invention.

Claims (2)

In an emergency lighting device such as a lamp for lighting the lamp by the power of the rechargeable battery at the time of power failure, the main power circuit portion (A) supplied with power through the transformer (T ₁ ), the main power circuit portion (A) so as to charge the rechargeable battery (NCB) A constant voltage circuit unit (C) supplied with power from the (C), a sub power circuit unit (D) having a smoothing capacitor (C ₃ ) for supplying power for electrostatic operation, and receiving power from the sub power circuit unit (D), A logic circuit section (e) for turning on the gate of the SCR (TH) during a power failure, a power switch SW ₁ , a voltage distribution resistors R ₁ , R ₂ , and a capacitor C ₄ . And a power detection circuit part (bar) for detecting a potential at the capacitor (C ₄ ) and outputting it to the logic circuit part (e). When the SCR (TH) is turned on, the inverter part (B) in the rechargeable battery NCB is turned on. B) Emergency points such as lighting lamps that supply a fluorescent lamp (FL) with a DC power supply. Equator. 2. The emergency lighting apparatus according to claim 1, wherein said logic circuit section comprises an input NAND gate.

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