JPH10241868A - Normal/emergency lighting circuit, normal/emergency lighting system and disaster prevention lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a normal/emergency lighting circuit which can be formed in a simple structure and miniaturized at a lower cost. SOLUTION: An AC-DC shared power input 11 is provided, to which AC voltage is input in normal operation and DC voltage is input in emergency, and input power passages after the power input 11 are combined in one system for an input judgment part 12 to judge the AC or DC type of voltage input the power input 11 so that a lighting part 14 can be controlled by a lighting control part 18 in accordance with the judgment result to vary an output level to a load 13 between normal operation and emergency. In this way, a power supply before the power input 11 can be separately designed as a power separate type and a lighting circuit unit can be advantageously formed in a more simple structure than the input power passages are formed in two systems.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regular / emergency lighting circuit, a regular / emergency lighting device, and a disaster prevention lighting device used for emergency or guidance.

[0002]

2. Description of the Related Art In general, an emergency light lighting device or an induction light lighting device includes a storage battery (battery) that is charged based on a commercial AC power supply in order to constantly light a lamp such as an emergency light or an induction light. A lighting circuit is configured to turn on the lamp based on an AC voltage supply from an AC power supply, and to turn on the lamp based on a DC voltage supply from a storage battery in an emergency such as a power failure. Here, in order to turn on the lamp based on the DC voltage of the storage battery, an inverter circuit is usually required, and the lamp is turned on by a high frequency voltage.

FIG. 6 is a block diagram showing an example of the configuration of a conventional ordinary / emergency lighting circuit. First, a power supply unit 2 for generating a predetermined DC voltage based on a supplied AC voltage is connected to a regular power supply input unit 1 connected to a commercial AC power supply (not shown) of AC 100V. The power supply unit 2 includes a filter circuit, a rectifier circuit, a smoothing circuit, and the like. On the other hand, an emergency power input unit 3 including a storage battery (not shown) serving as an emergency power source is provided separately from the regular power input unit 1. Emergency power input 3 and power 2
A common / emergency power supply switching section 4 is connected between the power supply and the power supply. The normal / emergency power supply switching unit 4 also includes a charging circuit unit for charging the storage battery based on the voltage supplied from the normal power supply input unit 1 and the power supply unit 2 at normal times. A lighting unit 6 for performing an oscillating operation based on one of the switched DC voltages and lighting a load 5 such as a lamp is connected to the rear stage of the service power supply switching unit 4. The lighting section 6 is constituted by an inverter circuit section 7 which is used for both regular and emergency purposes, and has an output section 8 to which the load 5 is connected on the output side.

[0004]

However, in the case of the conventional lighting circuit configuration as shown in FIG. 6, the normal power input section 1 and the emergency power input section 3 are separately provided as power input paths, and two paths are provided. It has been. For this reason, there is a disadvantage that the circuit configuration including the wiring and the like in the lighting circuit unit tends to be complicated. Accordingly, it tends to be disadvantageous in reducing the size and cost of the lighting circuit unit.

Accordingly, the present invention provides a normal / emergency lighting circuit and a normal / emergency lighting circuit in which an input power supply path can be integrated into one system in order to facilitate simplification of the circuit configuration, miniaturization and cost reduction. An object of the present invention is to provide an apparatus and a lighting device for disaster prevention.

[0006]

According to a first aspect of the present invention, there is provided a normal / emergency lighting circuit including: a power input unit for AC / DC common use in which an AC voltage is normally input and a DC voltage is input in an emergency; An input determination unit that determines whether a voltage input to the power supply is an AC voltage or a DC voltage; a lighting unit that has an output unit for the load and turns on the load by supplying power from a power input unit; A lighting control unit that varies the output level of the lighting unit with respect to the load in at least two stages based on the determination result by the unit.

In the present invention, an AC voltage is input to the AC / DC common power input unit in a normal state and a DC voltage is input in an emergency. An input determining unit determines which voltage is input. Based on the result of the determination, the lighting control section controls the lighting section to have an output level corresponding thereto when an AC voltage is input, and has an output level corresponding thereto when a DC voltage is input. Thus, the lighting section is controlled by the lighting control section. That is, the input power paths after the power input unit are combined into one system, and the power supply before the power input unit may be separately designed as a separate power supply type, as compared with the case where the power supply is separated into two systems. In configuring the lighting circuit, wiring processing, circuit configuration, and the like are simplified, and downsizing and cost reduction can be achieved.

In the present invention, the power input section means, for example, a mere power input terminal, and may be connected to a power supply device that inputs an AC voltage in a normal state and inputs a DC voltage in an emergency. The configuration of the power supply device itself including the switching circuit for switching from voltage output to DC voltage output does not matter. It may be an uninterruptible power supply. The input discriminating unit may be any unit that can discriminate between the AC voltage input and the DC voltage input by some means, and may be based on a voltage level or the like. The method of determining whether the voltage is an AC voltage or a DC voltage based on the presence or absence of a synchronization signal is simple and reliable, and has excellent responsiveness. The lighting unit may be configured to be able to light the load by sharing the AC voltage output (normal operation) and the DC voltage output (emergency operation). Thus, it is preferable to have a configuration including a power supply unit that receives a power supply from a power supply input unit and generates a predetermined DC voltage, and an inverter circuit unit that oscillates based on the DC voltage of the power supply unit and turns on a load. The circuit configuration of the inverter circuit section in this case is not particularly limited. The output unit means, for example, a simple lamp socket or the like, and the load may be detachably connected. Further, the lighting control unit controls the oscillation operation of the inverter circuit unit so that the load is lit at the maximum output when the result of the determination by the input determination unit is an AC voltage, and the load is dimmed and lit when the result of the determination is a DC voltage. For example, the configuration may include a microcomputer or the like. By varying the output level so that the load is dimmed and lit at the time of the DC voltage, the power consumption at the time of the DC voltage based on the storage battery or the like is reduced.

According to a fourth aspect of the present invention, there is provided a normal / emergency lighting device according to any one of the first to third aspects, and a load lamp connected to an output section of the lighting section. And; Therefore, in the present invention, since the normal / emergency lighting circuit according to any one of claims 1 to 3 is used, wiring processing, circuit configuration, and the like are simple.
The lamp can be constantly turned on at an appropriate output level with a small and low-cost circuit. Here, the lamp is a discharge lamp or the like, and is used as an emergency light or a guide light.

[0010] According to a fifth aspect of the present invention, there is provided a lighting device for disaster prevention,
A normal / emergency lighting device according to claim 4; and an appliance main body having a disaster prevention display body incorporating the normal / emergency lighting device including a lamp. Therefore, in the present invention,
Since the regular / emergency lighting device according to claim 4 is used, the lighting device for disaster prevention always lights at an appropriate output level.

[0011]

FIG. 1 shows a first embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 is a block diagram showing a unit configuration of a regular / emergency lighting circuit. In the figure, an AC / DC common power input unit 11 is provided which is connected to a power supply device (not shown) that automatically switches an output voltage so as to output an AC voltage in a normal state and output a DC voltage in an emergency such as a power failure. Have been. The input determination unit 12 is connected to the power input unit 11. This input discriminating unit 1
Reference numeral 2 has a function of determining whether the voltage input to the power input unit 11 is an AC voltage for normal use or a DC voltage for emergency use. A lighting unit 14 for lighting the load 13 is connected to the power input unit 11 via an input determining unit 12. The lighting unit 14 includes a power supply unit 15 for generating a predetermined DC voltage regardless of whether the voltage input to the power supply input unit 11 is an AC voltage or a DC voltage, and a DC voltage generated by the power supply unit 15. Inverter circuit section 16 having an oscillation function for generating an RF voltage by oscillating based on
The output stage 17 for detachably connecting the load 13 is provided at the last stage.

On the other hand, for the lighting section 14, especially the inverter circuit section 16, an inverter control section 18 serves as a lighting control section for controlling the oscillating operation to vary the output level.
Is connected. The inverter control unit 18 controls the inverter circuit unit 16 based on the result of the determination regarding the input voltage by the input determination unit 12.
Are connected so that the result of the determination can be input. In the present embodiment, the inverter control unit 18 controls the inverter circuit unit 16 to light the load 13 at the maximum output when the AC voltage is input, and lowers the output level when the DC voltage is input. The inverter circuit 16 is controlled so that the load 13 is dimmed and lit.

FIG. 2 is a circuit diagram showing a specific example of the configuration near the input discriminating section 12. As shown in FIG. In the figure, the power supply input section 11 is shown as an input power supply terminal 21, and a full-wave rectifier circuit 22 is connected between the input power supply terminals 21. Voltage dividing resistors R ₁ and R ₂ are connected between the output terminals of the full-wave rectifier circuit 22. A series circuit of these voltage dividing resistors R _1, zener the connection point R ₂ diode ZD and the resistor R ₃ is connected,
Transistor Q ₁ whose base is connected to the connection point between the Zener diode ZD and the resistor R ₃ are provided. A photodiode PD is connected between the transistor Q ₁ and the midpoint of the connection between the voltage dividing resistors R ₁ and R ₂ via a diode D ₁ , a smoothing capacitor C _{1 formed} by an electrolytic capacitor, and a resistor R ₄ . On the other hand, it is connected via a resistor R ₅ phototransistor PT to the power source V _DD constituting the photodiode PD and the photocoupler. This resistance R ₅
A determination terminal is set between the inverter and the collector of the phototransistor PT, and is connected to the microcomputer 23 in the inverter control unit 18.

[0014] On the other hand, smoothing capacitor C ₂ by the electrolytic capacitor through the diode D ₂ is between the output terminals of the full-wave rectifier circuit 22 is connected, the power supply unit 15 by these diodes D ₂ and the smoothing capacitor C ₂ Are formed.

The operation of the above embodiment will be described. First, during normal times, a 50/60 Hz commercial AC voltage is input from the power supply device to the power input unit 11.
This AC voltage is full-wave rectified by the full-wave rectifier circuit 22 and is output as a pulsating voltage. Thus, the Zener diode ZD is repeated a conducting state in synchronism with the cycle of the AC voltage and a non-conducting state, the on transistor Q ₁ may correspond
Repeat the OFF operation. As a result, the photodiode PD to which the light emitting current is supplied from the diode D ₁ , the smoothing capacitor C _1, and the resistor R ₄ repeats blinking in response to the on / off operation of the transistor Q ₁ . Accordingly, the phototransistor PT that operates by receiving light from the photodiode PD also repeats the on / off operation in response to the blinking of the photodiode PD. Is output in synchronism with the cycle of.

On the other hand, in an emergency such as a power failure, the voltage input from the power supply to the power input unit 11 is switched to a DC voltage. This DC voltage remains at the DC voltage even after passing through the full-wave rectifier circuit 22, and the Zener diode ZD is always turned on. Thus, the transistor Q ₁ is kept on, the photodiode PD also continues to emit light state without blinking. As a result, the phototransistor PT also keeps on, so that a determination signal of 0 V (L level) is output to the microcomputer 23 from the determination terminal.

Therefore, the microcomputer 23 can determine whether the voltage input to the power supply input unit 11 is an AC voltage for normal use or a DC voltage for emergency use based on the difference between the determination signals. In particular, in the present embodiment, since the determination is made based on the presence or absence of the synchronization signal synchronized with the AC voltage (whether or not the signal is a pulse signal), the determination process is performed with good responsiveness.

As a result of the determination, when the input voltage is an AC voltage, it is not necessary to limit the output level of the load 13, so that the inverter control unit 18
6 is controlled so that the load 13 is turned on at the maximum output.
On the other hand, when the input voltage is a DC voltage, the inverter control unit 18 lowers the output level of the inverter circuit unit 16 and dims and lights the load 13 in order to suppress power consumption because the power supply device depends on a storage battery or the like. . In this case, the maximum output control and the dimming control can be performed by the existing lighting control processing, and the details are omitted.

As described above, according to the present embodiment, both the AC voltage for normal use and the DC voltage for emergency use are configured to be input from the power input unit 11 that is shared between AC and DC. Since the input power supply path is integrated into one system, the power supply input unit itself is divided into two systems, one for AC and the other for DC, in configuring the lighting circuit unit.
Not only the wiring processing but also the circuit configuration itself can be simplified, and there is no need to mount a storage battery or the like in the lighting circuit unit itself, which is advantageous in reducing the size and cost.

A second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a block diagram showing a unit configuration of a regular / emergency lighting circuit. 1 and 2 are denoted by the same reference numerals and the description thereof is omitted (the same applies to the embodiments described later). In the present embodiment, the configuration of the lighting circuit unit includes a power supply block 31 and an inverter block 32.
The following shows an example in which the configuration is divided into blocks. The power supply block 31 includes a filter circuit / rectifier circuit 33 and a power supply circuit 34 corresponding to the power supply unit 15. Inverter block 3
2 is for two loads 13, two inverter circuit units 35 and 36 corresponding to the inverter circuit unit 16, and these inverter circuit units 3 and 36 corresponding to the inverter control unit 18.
An inverter control unit 37 common to 5 and 36 is provided. In FIG. 3, the input discrimination unit 12 is not shown.

That is, due to the problem of mounting the apparatus or the system, if the lighting circuit unit is divided into the power supply block 31 and the inverter block 32 as in the present embodiment, it is possible to develop multiple models having different load capacities. For this purpose, there is an advantage that the power supply block 31 can be shared. In this case, although the power supply circuit 34 requires a smoothing capacitor C ₃ for smoothing output to the secondary side, the case where the power supply block 31 in common achieve different various models deployment load capacitance approximately in the load capacitor Since the ripple current on the secondary side of the power supply circuit 34 increases in proportion, the smoothing capacitor C ₃
Power supply block 3
1 is oversized and over-designed for low power models. In this regard, in the present embodiment, the capacitance of the smoothing capacitor C ₃ is not so large, and common minimum volume for all models, the capacitance of the smoothing capacitor C ₄ each inverter unit block 32 to compensate for the shortage It is configured to be held on the side. Thus, the power supply block 31 can be shared for each model without increasing the size.

In FIG. 3, the smoothing capacitors C ₃ and C ₄
For example, an electrolytic capacitor or an organic semiconductor capacitor is used. Also, in the illustrated example, since the model is an example for two loads 13, two inverter circuit units 35,
36 is provided, but for one load 13, the inverter block 32 or the inverter block 32 is omitted.

A third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a circuit diagram showing a unit configuration of a regular / emergency lighting device. In the case of FIG. 3, the configuration example of the inverter unit block 32 in which each load 13 is turned on by the individual inverter circuit units 35 and 36 is described. However, in the present embodiment, a plurality of units,
3 shows an example of the configuration of an inverter block 44 in which discharge lamps 41 and 42 as one load are turned on by one inverter circuit 43. Note that 45 is an inverter control unit 37
Is a control unit block, 46 is a switching circuit block,
47 indicates a power supply block. Switching circuit block 4
The switching method in 6 may be a non-contact method using a semiconductor element or the like or a contact method such as a relay contact.

A fourth embodiment of the present invention will be described with reference to FIG. FIG. 5 is an external perspective view showing the disaster prevention lighting device. The illustrated example is a light guide type guide light device 51, in which a tool main body 53 is embedded in a passage ceiling 52, and a thin light guide unit 54 is attached to the tool main body 53 so as to hang. The light guide plate 55 of the light guide unit 54
A disaster prevention display 57 having a pattern 56 for evacuation guidance formed on both side surfaces of the display. Light guide plate 5 of light guide unit 54
At the upper end of 5, an illumination lighting device 58 for disaster prevention, which is built in the appliance main body 53, is provided. That is, the ordinary / emergency lighting circuit having the configuration shown in FIG. 1 and the like and the discharge lamp 59 corresponding to the load 13 are built in the appliance main body 53, and the discharge lamp 5
The disaster prevention indicator 57 is configured to be illuminated and displayed by turning on nine lights.

[0025]

According to the first and second aspects of the present invention,
The input power path after the power input section is integrated into one system, the type of voltage input to the power input section is determined by the input determination section, and the lighting section is controlled by the lighting control section according to the determination result, whereby the load is reduced. Since the output level for the power supply unit is made variable, the power supply unit before the power supply input unit may be separately designed as a separate power supply type. Wiring processing, circuit configuration, and the like are simplified, and downsizing and cost reduction can be achieved.

According to the third aspect of the present invention, the input determining section determines whether the input signal is an AC voltage or a DC voltage based on the presence or absence of a synchronizing signal synchronized with the AC voltage. This is a discrimination method with excellent responsiveness.

According to the fourth aspect of the present invention, it is possible to provide a regular / emergency lighting device capable of constantly lighting a load by a lighting circuit unit having a simple structure, reduced in size and reduced in cost.

According to the fifth aspect of the present invention, it is possible to provide a lighting device for disaster prevention, in which a lamp is always lit by a lighting circuit unit having a simple structure, reduced in size and reduced in cost.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a unit configuration of a regular / emergency lighting circuit according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram showing a specific configuration example near the input discriminating unit;

FIG. 3 is a block diagram showing a unit configuration of a regular / emergency lighting circuit according to a second embodiment of the present invention;

FIG. 4 is a circuit diagram showing a unit configuration of a regular / emergency lighting device according to a third embodiment of the present invention.

FIG. 5 is an external perspective view illustrating a disaster prevention lighting device according to a fourth embodiment of the present invention.

FIG. 6 is a block diagram showing an example of a unit configuration of a conventional ordinary / emergency lighting circuit.

[Explanation of symbols]

 11: Power input unit 12: Input discriminating unit 13: Load 14: Lighting unit 15: Power supply unit 16: Inverter circuit unit 17: Output unit 18: Lighting control unit 53: Appliance body 57: Disaster prevention display unit 58: Regular / Emergency Lighting device 59: Lamp

Claims (5)

[Claims] 1. An AC / DC common power input unit to which an AC voltage is input in a normal state and a DC voltage is input in an emergency; and whether the voltage input to the power input unit is an AC voltage or a DC voltage. An input determination unit; a lighting unit having an output unit for the load and lighting the load by power supply from the power input unit; and adjusting the output level of the lighting unit to the load in at least two stages based on the determination result by the input determination unit. A variable lighting control unit;
Emergency lighting circuit. 2. The lighting section includes: a power supply section that receives a power supply from a power input section to generate a predetermined DC voltage; and an inverter circuit section that oscillates based on the DC voltage of the power supply section to light a load. The lighting control unit controls the oscillating operation of the inverter circuit unit so that the load is lit at the maximum output when the determination result is an AC voltage, and the load is dimmed and lit when the determination result is a DC voltage. The normal and emergency lighting circuit according to claim 1. 3. The normal / emergency use according to claim 1, wherein the input determination section determines whether the input signal is an AC voltage or a DC voltage based on the presence or absence of a synchronization signal synchronized with the AC voltage. Lighting circuit. 4. A normal / emergency lighting circuit comprising: a normal / emergency lighting circuit according to claim 1; and a load lamp connected to an output section of the lighting section. Lighting device. 5. A lighting device for disaster prevention, comprising: the normal / emergency lighting device according to claim 4; and a fixture body having a disaster prevention display body having a built-in normal / emergency lighting device including a lamp. .