JP2011249133A - Emergency illumination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an emergency illumination device that makes a person who is away from the emergency illumination device visually aware of abnormality of a secondary battery in such a case.SOLUTION: A lighting portion 11 comprises LEDs 1 which are semiconductor light emitting elements. A control portion 7 includes a voltage detection portion 6 which detects the voltage across the secondary battery 2, and a determination portion 8 which determines whether the secondary battery 2 is abnormal based upon the voltage across the secondary battery 2 detected by the voltage detection portion 6 while a lighting circuit portion 4 turns on the lighting portion 11 forcibly by electric power supply from the secondary battery 2 when inspection start means 5 instructs inspection of the secondary battery 2. The control portion 7 makes a charging current from a charging circuit portion 3 to the secondary battery 2 smaller than that when the secondary battery 2 is normal or stops supplying the charging current from the charging circuit portion 3 to the secondary battery 2 when the determination portion 8 determines that the secondary battery 2 is abnormal so as to make the lighting circuit portion 4 blink the lighting portion 11 through electric power supply from a commercial power source AC, thereby indicating the abnormality of the secondary battery 2.

Description

  The present invention relates to an emergency lighting device such as an emergency light, and particularly uses a semiconductor light emitting element such as an LED as a light source.

  The emergency lighting device turns on a light source (emergency lighting) with a built-in secondary battery in order to ensure lighting such as an escape passage during a power failure due to a fire or the like. For this reason, inspection of the state of charge of the secondary battery is required by the Fire and Disaster Management Agency Notification and the Building Standard Law.

  Therefore, for the purpose of saving labor in the inspection of the state of charge of the secondary battery, as an emergency lighting device, for example, as shown in FIG. 2, a lamp 10 composed of a cold cathode discharge lamp and this lamp 10 are turned on. A lighting circuit unit 20, a secondary battery (battery) 9 that supplies a DC voltage to the lighting circuit unit 20 in the event of a power failure due to a fire, a power circuit 13 that converts an AC voltage from a commercial power source into a DC voltage, and a power circuit 13 A charging circuit 14 for trickle charging the secondary battery 9 with a DC voltage from the diode, a diode OR circuit 16 for transmitting the DC voltage from the power supply circuit 13 or the DC voltage from the secondary battery 9 to the lighting circuit unit 20, and a lighting circuit An emergency lighting device including a control circuit 15 that controls a DC voltage supplied to the unit 20 has been proposed (see Patent Document 1). A terminal block 19 to which a commercial power supply is connected is provided on the input side of the power supply circuit 13. Further, the lighting circuit unit 20 turns on the lamp 10 by converting the DC voltage boosted by the DC-DC converter circuit 17 into an AC voltage, and a DC-DC converter circuit 17 that boosts the DC voltage from the power supply circuit 13. And an inverter circuit 18. The diode OR circuit 16 transmits a DC voltage from the power supply circuit 13 to the DC-DC converter circuit 17 during normal lighting and a DC voltage from the secondary battery 9 during emergency lighting such as a power failure or inspection.

  The control circuit 15 detects a DC voltage supplied from the charging circuit 14 to the secondary battery 9 (not shown), and the abnormality of the secondary battery 9 based on the voltage detected by the voltage detection means. And an abnormality determining means (not shown) for determining the presence or absence of The control circuit 15 is connected to a battery monitor 4 composed of a red LED and a green LED as display means for displaying the presence or absence of abnormality in the charged state of the secondary battery 9. Further, the control circuit 15 is connected to an inspection switch 12 for starting the inspection of the charged state of the secondary battery 9.

  The control circuit 15 controls the battery monitor 4 based on the determination result in the abnormality determination means. Here, the control circuit 15 causes only the red LED of the battery monitor 4 to emit light when there is an abnormality in the charging state of the secondary battery 9, and the green color of the battery monitor 4 when there is no abnormality in the charging state of the secondary battery 9. Only the LED emits light.

  Conventionally, an emergency lighting device using a semiconductor light emitting element such as an LED (for example, a white LED) or a semiconductor laser as a light source has been proposed (for example, Patent Document 2). In addition, the emergency lighting device disclosed in Patent Document 2 includes a battery monitor including a green LED that displays a charging state of the secondary battery.

JP 2007-35652 A JP 2006-54077 A

  In the emergency lighting device shown in FIG. 2, only the red LED of the battery monitor 4 emits light when it is determined by the abnormality determination means that there is an abnormality in the charged state of the secondary battery 9. It can be visually recognized that there is an abnormality in the state of charge of the battery 9. However, the battery monitor 4 is often used with a low illuminance, and there is a concern that it is difficult for an inspection operator or administrator to notice an abnormality in the charged state of the secondary battery 9 unless approaching to the vicinity of the emergency lighting device. .

  Similarly, the emergency lighting device disclosed in Patent Document 2 displays the state of charge of the secondary battery by a battery monitor, and an inspection worker, a manager, or the like does not get close to the emergency lighting device. There is a concern that it is difficult to notice the charged state of the secondary battery.

  The present invention has been made in view of the above reasons, and its purpose is emergency lighting that allows a person away from the emergency lighting device to visually recognize an abnormality of the secondary battery when the secondary battery is abnormal. Providing equipment.

  The emergency lighting device according to the present invention includes a lighting unit composed of a semiconductor light emitting element, a lighting circuit unit that lights the lighting unit by supplying power from a commercial power source or a secondary battery, and the second unit by supplying power from the commercial power source. A charging circuit unit that charges a secondary battery; and a control unit that causes the lighting circuit unit to light the lighting unit by supplying power from the secondary battery when power supply from the commercial power source to the lighting circuit unit is interrupted. An inspection start means for starting the inspection of the secondary battery, wherein the control section detects the voltage of the secondary battery, and the inspection start means checks the secondary battery. The secondary battery is based on the voltage of the secondary battery detected by the voltage detection unit by forcibly supplying power from the secondary battery when instructed to turn on the lighting unit by the lighting circuit unit. The difference The charging circuit unit can vary a charging current for charging the secondary battery, and the control unit controls the secondary battery by the determining unit. If it is determined that there is an abnormality, the charging current from the charging circuit unit to the secondary battery is made smaller than when the secondary battery is normal or the supply of charging current from the charging circuit unit to the secondary battery is stopped. Then, the lighting circuit unit is caused to display an abnormality of the secondary battery by blinking the lighting unit by supplying power from the commercial power source.

  In this emergency lighting device, the lighting circuit unit can vary a current supplied to the lighting unit, and when the lighting circuit unit blinks the lighting unit by power supply from the commercial power source, It is preferable to reduce the current supplied to the lighting unit as compared with the case where the lighting unit is lit by supplying power from the secondary battery.

  In the emergency lighting device of the present invention, it becomes possible for a person away from the emergency lighting device to visually recognize the abnormality of the secondary battery when the secondary battery is abnormal.

It is a circuit block diagram which shows the emergency illuminating device of embodiment. It is a circuit block diagram which shows the emergency illuminating device of a prior art example.

  As shown in FIG. 1, the emergency lighting device of the present embodiment includes a lighting unit 11 composed of a plurality of LEDs 1, a lighting circuit unit 4 that lights the lighting unit 11, and a power failure of the commercial power supply AC due to a fire or the like. The secondary battery 2 that supplies power to the lighting circuit unit 4 at times, the switch element Q1 that transmits the power supply from the secondary battery 2 to the lighting circuit unit 4, and the secondary battery by power supply from the commercial power source AC A charging circuit unit 3 for charging 2, a switching element Q 2 for transmitting power supply from the commercial power supply AC to the lighting circuit unit 4, a control unit 7 for controlling the switching elements Q 1 and Q 2 and the charging circuit unit 3, and a control The unit 7 is provided with inspection start means 5 for starting the inspection of the charged state of the secondary battery 2.

  Here, the lighting unit 11 has a plurality of LEDs 1 connected in series, but is not limited to series connection, and may be connected in parallel or may be connected in series and parallel. Moreover, although white LED is used as LED1 of the lighting part 11, a luminescent color is not specifically limited to white. In the present embodiment, the LED 1 constitutes a semiconductor light emitting element, but the semiconductor light emitting element is not limited to the LED 1 and may be, for example, a semiconductor laser.

  In addition, the switch elements Q1 and Q2 are configured by bipolar transistors, but the present invention is not limited thereto, and may be configured by, for example, MOSFETs.

  In addition, the charging circuit unit 3 is configured so that the charging current for charging the secondary battery 2 can be varied.

  In the emergency lighting device of the present embodiment, the control unit 7 normally turns off the switch element Q1 and turns on the switch element Q2, and the lighting circuit unit 4 is supplied with power from the commercial power supply AC. Lights up. The charging circuit unit 3 charges the secondary battery 2 by supplying power from the commercial power source AC.

  The control unit 7 is lit by power supply from the secondary battery 2 when the inspection of the secondary battery 2 is instructed by the voltage detection unit 6 that detects the voltage of the secondary battery 2 and the inspection start unit 5. The lighting unit 11 is turned on by the circuit unit 4, and a determination unit 8 that determines whether there is an abnormality in the charged state of the secondary battery 2 based on the voltage of the secondary battery 2 detected by the voltage detection unit 6 is provided. . Moreover, the control part 7 is provided with the power failure detection part (not shown) which detects that the electric power supply from the commercial power supply AC to the lighting circuit part 4 was interrupted (power failure). Here, when the control unit 7 detects that the power supply from the commercial power supply AC to the lighting circuit unit 4 is interrupted by the power failure detection unit, the control unit 7 turns on the switch element Q1 to start the lighting circuit unit from the secondary battery 2. 4 is supplied with power so that the lighting circuit unit 4 lights the lighting unit 11 for a predetermined time. The control unit 7 is configured by a microcomputer or the like, and the determination unit 8 can be configured by installing an appropriate program in the microcomputer. The control unit 7 is not limited to a microcomputer, and may be configured by discrete electronic components. The inspection start means 5 is constituted by an inspection switch and provided with a pull string for operation by an inspector or the like, but the inspection switch may be constituted by a push button switch or the like.

  When the inspection start means 5 instructs the start of inspection of the charged state of the secondary battery 2, the controller 7 forcibly turns off the switch element Q2 and then forcibly turns on the switch element Q1. Electric power is supplied from the secondary battery 2 to the lighting circuit unit 4, and the lighting unit 11 is lit by the lighting circuit unit 4. The control unit 7 detects the voltage of the secondary battery 2 with the voltage detection unit 6, and the determination unit 8 charges the secondary battery 2 based on the voltage of the secondary battery 2 detected with the voltage detection unit 6. Determine if there is an abnormality in the condition.

  When the control unit 7 determines that the secondary battery 2 is abnormal by the determination unit 8, the control unit 7 reduces the charging current from the charging circuit unit 3 to the secondary battery 2 compared to when the secondary battery 2 is normal, and the lighting circuit unit 4, the abnormality of the secondary battery 2 is displayed by blinking the lighting part 11 by the power supply from the commercial power source AC. When the control unit 7 determines that the secondary battery 2 is abnormal, the control unit 7 sends a control signal for controlling the charging current supplied from the charging circuit unit 3 to the secondary battery 2 to the charging circuit unit 3. . On the other hand, when the control signal sent from the control unit 7 is input, the charging circuit unit 3 reduces the charging current supplied to the secondary battery 2. However, the operation when the control unit 7 determines that there is an abnormality in the secondary battery 2 is not limited thereto, and charging from the charging circuit unit 3 to the secondary battery 2 may be stopped. In this case, the charging circuit unit 3 stops the supply of the charging current to the secondary battery 2 in accordance with the control signal sent from the control unit 7. This is because when the charging state of the secondary battery 2 is abnormal (for example, when the lighting circuit unit 4 lights the lighting unit 11 by supplying power from the secondary battery 2, the voltage of the secondary battery 2 is reduced in a few seconds. Even when the charging circuit unit 3 charges the secondary battery 2, the secondary battery 2 is less likely to accumulate energy, and the lighting unit 11 is lit only for a few seconds even if it is discharged. This is because they cannot. The control unit 7 turns off the switch element Q1, then turns on and off the switch element Q2, and blinks the lighting unit 11 by supplying power from the commercial power supply AC, and confirms that the charging state of the secondary battery 2 is abnormal. indicate.

  Therefore, when the lighting unit 11 blinks, it can be clearly displayed that there is an abnormality in the charging state of the secondary battery 2.

  In the emergency lighting device described above, when the determination unit 8 of the control unit 7 determines that the secondary battery 2 is abnormal, the control unit 7 supplies the charging current from the charging circuit unit 3 to the secondary battery 2 for two times. The secondary battery 2 is made smaller than when the secondary battery 2 is normal or the supply of the charging current from the charging circuit unit 3 to the secondary battery 2 is stopped, and the lighting circuit unit 4 is caused to blink by the power supply from the commercial power supply AC. Accordingly, the abnormality of the secondary battery 2 is displayed, so that it is possible for a person away from the emergency lighting device to visually recognize the abnormality of the secondary battery 2 when the secondary battery 2 is abnormal. As compared with the case where the lighting unit 11 is turned on while charging with the same charging current as in the normal state, the power consumption can be reduced, and the circuit component can be prevented from being enlarged. In short, in the emergency lighting device of this embodiment, even if the inspection operator of the emergency lighting device operates the inspection start means 5 and then leaves the emergency lighting device, Even if it is not close to the lighting device, it becomes easy to visually recognize that there is an abnormality in the charging state of the secondary battery 2, and the secondary battery 2 can be replaced at an early stage so that the emergency lighting device can be used without any problem during a power failure due to a fire or the like. In addition to being able to operate, it is possible to prevent an increase in component cost due to an increase in circuit component size.

  When the lighting circuit unit 4 blinks the lighting unit 11 by supplying power from the commercial power supply AC when the charging state of the secondary battery 2 is abnormal, the lighting unit 11 is supplied by supplying power from the secondary battery 2. It is preferable to reduce the current supplied from the lighting circuit section 4 to the lighting section 11 as compared with the case where the lamp is turned on. This is achieved by supplying the lighting unit 11 with a current necessary to ensure the amount of light necessary to display the abnormality of the secondary battery 2. From the viewpoint of power saving, the current passed through the lighting unit 11 is This is because it is only necessary to be within the range where the amount of light can be secured. In this case, it goes without saying that the lighting circuit unit 4 can vary the current supplied to the lighting unit 11.

1 LED (semiconductor light emitting device)
2 Secondary battery 3 Charging circuit unit 4 Lighting circuit unit 5 Inspection start means 6 Voltage detection unit 7 Control unit 8 Judgment unit 11 Lighting unit AC commercial power supply

Claims (2)

  A lighting unit composed of a semiconductor light emitting element; a lighting circuit unit that lights the lighting unit by supplying power from a commercial power source or a secondary battery; and a charging circuit unit that charges the secondary battery by supplying power from the commercial power source. A control unit that causes the lighting circuit unit to light the lighting unit by supplying power from the secondary battery when power supply from the commercial power source to the lighting circuit unit is interrupted, and starts inspection of the secondary battery An inspection start means for causing the control section to detect the voltage of the secondary battery, and forcibly when the inspection start means instructs the inspection of the secondary battery. A determination unit that determines whether or not there is an abnormality in the secondary battery based on the voltage of the secondary battery detected by the voltage detection unit by turning on the lighting unit by the lighting circuit unit by supplying power from the secondary battery. When And the charging circuit unit can vary a charging current for charging the secondary battery, and the control unit determines that the secondary battery has an abnormality by the determination unit, the charging The charging current from the circuit unit to the secondary battery is made smaller than when the secondary battery is normal or the supply of charging current from the charging circuit unit to the secondary battery is stopped. An emergency lighting device, wherein an abnormality of the secondary battery is displayed by blinking the lighting unit by supplying power from a commercial power source.   The lighting circuit unit can vary a current supplied to the lighting unit, and when the lighting circuit unit blinks the lighting unit by supplying power from the commercial power source, power is supplied from the secondary battery. 2. The emergency lighting device according to claim 1, wherein the current supplied to the lighting unit is made smaller than when the lighting unit is turned on.

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