JP5212639B2 - Emergency lighting device - Google Patents

Description

  The present invention relates to an emergency lighting device that turns on a light source using a battery as a power source when a commercial power supply fails.

An emergency lighting device such as a guide light or an emergency light uses an emergency lighting device that always turns on a light source with a commercial power source and charges the battery, and turns on the light source using the battery as a power source when the commercial power source fails.

  Various parts are used in this emergency lighting device. Among these parts, there is an electrolytic capacitor used for smoothing a power source as a part having a relatively short life.

  In this electrolytic capacitor, the electrolytic solution evaporates and decreases with the aging, and at the end of the life, the equivalent series resistance of the electrolytic solution increases and the temperature rises in addition to the capacity reduction due to the decrease of the electrolytic solution. Eventually, when the heat generation increases due to the ripple current and the heat dissipation cannot catch up, the temperature rapidly increases due to thermal runaway, and there is a possibility that the case may burst with the pressure of the evaporation gas of the electrolyte exceeding the boiling point of the electrolyte.

Although it is a general lighting lighting device, the time during which the electrolytic capacitor used in this lighting lighting device is energized is counted, and the lifetime of the electrolytic capacitor is detected when the count value reaches a predetermined specified time. Alternatively, the life of the electrolytic capacitor is detected by detecting characteristic changes such as ripple current and temperature of the electrolytic capacitor (see, for example, Patent Document 1).
JP 2006-236666 A (page 4-5, FIG. 1)

  By detecting the life of a part before the part has reached the end of its life, it is possible to replace the lighting device or fixture, but it is necessary to clearly notify that the life of the part has been detected. There is a risk that the response will be delayed and the components that have reached the end of their service life may become abnormal.

  The present invention has been made in view of such points, and provides an emergency lighting device that can clearly notify that the life of a component has been detected and can prevent the component that has detected the life from reaching an abnormal state. The purpose is to do.

  The emergency lighting device according to claim 1 is a constant lighting circuit that always lights a light source with a commercial power source, a battery that serves as a power source during a power failure of the commercial power source, a charging circuit that charges the battery with the commercial power source, The emergency lighting circuit that turns on the light source using the battery as a power source in the event of a power failure, the component life detection means that detects the component life, and the component life detection means that the light source is turned off by the always-on circuit after the component life is detected In addition, there is provided control means for stopping charging of the battery by the charging circuit and discharging the power of the battery.

  The light source may be either an LED or a discharge lamp.

  The constant lighting circuit may have any circuit configuration as long as the light source can be lit with a predetermined light flux by a commercial power source.

  The battery has a capacity capable of maintaining the lighting state of the light source with a predetermined luminous flux for a predetermined time during a power failure of the commercial power source.

  The charging circuit charges the battery with a commercial power source.

  The emergency lighting circuit may have any circuit configuration as long as the light source can be lit with a predetermined luminous flux for a predetermined time using a battery as a power source.

  The component life detection means is constituted by, for example, a detection circuit or a microcomputer. For example, there is a smoothing electrolytic capacitor as a component for detecting the life, and the time during which the electrolytic capacitor is energized is counted, and when the count value reaches a predetermined specified time, the life of the electrolytic capacitor is detected, Alternatively, the life of the electrolytic capacitor is detected by detecting changes in characteristics such as ripple current and temperature of the electrolytic capacitor. The component for detecting the lifetime is not limited to the electrolytic capacitor, and may be another component having a short lifetime among the components used in the emergency lighting device.

  The control means is constituted by, for example, a microcomputer, and controls the constant lighting circuit, the charging circuit, and the emergency lighting circuit based on the detection of the component life detection means. Then, after the component life detecting means detects the component life, the lighting of the light source by the constant lighting circuit and the charging of the battery by the charging circuit are stopped. Also, the control means forcibly discharges the power remaining in the battery after the part life detection means detects the part life, or operates the emergency lighting circuit to supply the power remaining in the battery to the light source. Thus, the battery is prevented from functioning as a power source after discharging, for example, by turning it on. As a result, the original function of the lighting circuit (lighting the light source) is not exhibited at all times regardless of emergency.

  Emergency lighting devices are used for emergency equipment such as guide lights and emergency lights.

The emergency lighting device according to claim 2 is the emergency lighting device according to claim 1, wherein the control means permits the lighting of the light source using the battery as a power source by the emergency lighting circuit to discharge the power of the battery. To do.

Emergency lighting device according to claim 3, wherein, in the emergency lighting device according to claim 1 or 2 wherein the control means, inspection mode for lighting the light source of the battery as a power source by an emergency lighting circuit stops the constant lighting circuit And the inspection mode is prohibited after the component life detecting means detects the component life.

  The inspection mode is a mode in which the life of the battery is inspected. The emergency lighting circuit forcibly turns on the light source with the battery as a power source, and the light source maintains a predetermined luminous flux and lights up for a predetermined time (for example, 20 minutes). Inspect whether to do. If the inspection is not satisfied, the battery needs to be replaced. Then, after the component life detecting means detects the component life, the light source is not turned on even if the inspection mode is selected.

The emergency lighting device according to claim 4 is the emergency lighting device according to claim 1 or 3, wherein the control means detects the component life after the component life detection means detects the component life, The stop state of the always-on circuit and the charging circuit is maintained.

  Re-supplying commercial power includes recovery from a power failure of the commercial power, and switching on from a cut-off state with a switch that turns on and off the commercial power.

  According to the emergency lighting device of claim 1, after the component life detection means detects the component life, in order to stop the lighting of the light source by the always-on circuit, clearly notify that the component life is detected. In addition, it stops charging the battery by the charging circuit, discharges the battery power, and prevents the battery from functioning as a power source after the battery is discharged. , It is possible to prevent an abnormality from occurring in a part whose life has been detected.

According to the emergency lighting device of the second aspect, in addition to the effect of the emergency lighting device of the first aspect, in order to discharge the power of the battery, the lighting of the light source using the battery as the power source by the emergency lighting circuit Can be allowed.

According to the emergency lighting device according to claim 3, in addition to the effects of the emergency lighting device according to claim 1 or 2, with parts life detection means to the after detecting part life, stops always lighting circuit Even if the inspection mode that turns on the light source with the battery as the power source is selected by the emergency lighting circuit, the inspection mode is prohibited, so it is possible to clearly notify that the component life has been detected and the component life has been reached. It can be prevented from being mistaken.

According to the emergency lighting device of the fourth aspect , in addition to the effect of the emergency lighting device of the first or third aspect , after the component lifetime detecting means detects the component lifetime, the commercial power supply is turned on again. However, since the stop state of the always-on circuit is maintained, it can be prevented that the light source is turned on and the component life is not reached due to the commercial power being turned on again.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a circuit diagram of an emergency lighting device, and FIG. 2 is a perspective view of an exploded state of a guide lamp using the emergency lighting device.

  As shown in FIG. 2, the guide light 11 as an emergency instrument is a double-sided display type, and includes a guide light main body 12 and display bodies 13 that are detachably attached to both side surfaces of the guide light main body 12. .

  A plurality of LEDs 14 as light sources for illuminating the respective display bodies 13 are arranged on the upper portions of both side surfaces of the guide light main body 12. Inside the guide light main body 12, a terminal block 15 for connecting a power supply line for supplying commercial power and an emergency lighting device 16 for lighting the LED 14 are arranged.

  The emergency lighting device 16 includes a battery 17, and when the commercial power is supplied, the LED 14 is turned on with the commercial power and the battery 17 is charged. When the commercial power is interrupted, the LED 14 is turned on using the battery 17 as a power source. A plurality of operation switches, a display monitor, and an operation display unit 18 such as a remote control light receiving unit are disposed on the bottom surface of the emergency lighting device 16 facing the outside from the bottom surface opening of the guide light main body 12.

  Next, as shown in FIG. 1, in the emergency lighting device 16, a fuse FU, a noise cutting filter circuit 21, and a diode bridge 22 that is a full-wave rectifier are sequentially connected to a commercial power source e that is an AC power source. Has been.

  In the filter circuit 21, a varistor VA1 and a capacitor C1 are connected between power supply lines, and a common mode choke Tr1 is connected to the input side of the diode bridge 22.

  On the output side of the diode bridge 22, a power supply monitoring circuit 24 for monitoring the supply of the commercial power supply e, a smoothing electrolytic capacitor C2, a primary side of the transformer Tr2, and a power supply circuit (IPD circuit) 25 using IPD as a power device, Are connected in series.

  One of the two secondary windings of the transformer Tr2 has a charging circuit 27 for charging the battery 17 with a commercial power source e through a rectifying / smoothing circuit of a rectifying diode D1 and a smoothing capacitor C3, and a battery 17 An emergency lighting circuit 28 for lighting the LED 14 using the battery 17 as a power source at the time of a power failure of the commercial power source e is sequentially connected. The charging circuit 27 charges the battery 17 with the commercial power source e, and has a quick charging function for rapidly charging the battery 17.

  The other of the two windings on the secondary side of the transformer Tr2 has a constant lighting circuit 30 for lighting the LED 14 by the commercial power source e through a rectifying and smoothing circuit of a rectifying diode D2 and a smoothing capacitor C4. It is connected. Information on the constant current of the constant lighting circuit 30 is fed back to the control of the electric wire circuit 25.

  The emergency lighting circuit 28 and the constant lighting circuit 30 are connected to a lighting control circuit 33, and the LED 14 is connected to the lighting control circuit 33. The lighting control circuit 33 includes a constant current control circuit that controls power supply from the emergency lighting circuit 28 and the constant lighting circuit 30 to supply a constant current to the LED 14, and a short circuit detection circuit that detects a short circuit of the LED 14. It has a function.

  The emergency lighting device 16 includes a microcomputer 35, to which a wall cutting circuit 36, a power supply monitoring circuit 24, a charging circuit 27, a lighting control circuit 33, a control circuit 37, and a remote control transmission / reception circuit 38 are connected. ing.

  The wall cutting circuit 36 turns on and off the LED 14 by operating an external manual switch.

  The control circuit 37 includes an inspection switch 40 for selecting an inspection mode, a lamp replacement switch 41 for inputting that the LED 14 has been replaced, a charge monitor 42 for displaying the state of the battery 17, a lamp monitor 43 for displaying the state of the LED 14, and an inspection. An inspection monitor 44 for displaying the mode is connected. These switches and monitors are arranged on the operation display unit 18 of the guide light main body 12, and can be operated and visually recognized from the outside.

  To the remote control transmission / reception circuit 38, a light receiving unit 46 that receives a signal transmitted from a remote control (not shown) and a light emitting unit 47 that transmits a signal to the remote control are connected.

  Based on the monitoring status of the power supply monitoring circuit 24, the microcomputer 35 always turns on the LED 14 with the commercial power source e by the always-on circuit 30 and the lighting control circuit 33 when supplying the commercial power source e, and the battery 17 by the charging circuit 27. Has the function of the control means 51 for charging the battery.

  The microcomputer 35 has a function of a component life detecting means 52 for detecting the component life. Among the components used in the emergency lighting device 16, there is a smooth electrolytic capacitor C2 having a short lifetime as a component whose lifetime is detected by the component lifetime detecting means 52. The component life detection means 52 integrates the time during which the electrolytic capacitor C2 is energized, and detects the life of the electrolytic capacitor C2 when the integrated value reaches a predetermined specified time. Alternatively, the life of the electrolytic capacitor C2 is detected by exceeding the threshold value in which the ripple component included in the DC voltage converted from the alternating current is larger than the initial value due to the capacity decreasing at the end of the life of the electrolytic capacitor C2, The life of the electrolytic capacitor C2 is detected by detecting a change in characteristics, such as detecting the life of the electrolytic capacitor C2 by generating heat when the capacity decreases at the end of the life of the electrolytic capacitor C2, and the temperature exceeding a certain threshold. Either the energization time or the characteristic change may be used to detect the life of the electrolytic capacitor C2, but the energization time simplifies the program processing for control in the normal state before the specified time, and the characteristics According to the change, it is possible to accurately detect the life change of the electrolytic capacitor C2 due to the environment or the like.

  In addition, after the component life detection unit 52 detects the component life, the control unit 51 stops the lighting of the LED 14 by the constant lighting circuit 30, stops the charging of the battery 17 by the charging circuit 27, and the battery 17 It has a function of discharging the power. To discharge the power of the battery 17, the power remaining in the battery 17 is forcibly discharged, or the emergency lighting circuit 28 is operated to supply the power remaining in the battery 17 to the LED 14 and the emergency lighting is performed. Let

  Further, the control means 51 can select the inspection mode in which the constant lighting circuit 30 is stopped and the LED 17 is turned on with the battery 17 as a power source by the emergency lighting circuit 28, and after the component life detection means 52 detects the component life, , Has a function to prohibit the inspection mode. This inspection mode is a mode for inspecting the life of the battery 17, and the emergency lighting circuit 28 forcibly turns on the LED 14 with the battery 17 as a power source, and the LED 14 maintains a predetermined luminous flux for a predetermined time (for example, 20). Inspect whether it lights up more than a minute). If the inspection is not satisfied, the battery 17 needs to be replaced.

  Furthermore, after the component life detection means 52 detects the component life, the control means 51 also displays information that the component life detection means 52 has detected the component life even when the commercial power source e is out of power or when the commercial power source e is shut off. The function is held in the control means 51 and maintains the stopped state of the constant lighting circuit 30 even if the commercial power source e is turned on again after the commercial power source e is interrupted or cut off. . The information for detecting the component life is retained by causing the microcomputer 35 to function with some power source such as a battery or using a non-volatile memory even when the commercial power source e is interrupted or cut off.

  Next, the operation of the emergency lighting device 16 will be described.

  When the commercial power source e is supplied, the commercial power source e removes noise such as high frequency components by the filter circuit 21, is full-wave rectified by the diode bridge 22, is smoothed by the electrolytic capacitor C2, and is supplied to the power circuit 25 and the transformer. Supplied to Tr2. A current flows to the primary side of the transformer Tr2 under the control of the power supply circuit 25, and DC power is supplied to the charging circuit 27 via the rectifying and smoothing circuit of the rectifying diode D1 and the smoothing capacitor C3 connected to the secondary side of the transformer Tr2. In addition, DC power is always supplied to the lighting circuit 30 through the rectifying and smoothing circuit of the rectifying diode D2 and the smoothing capacitor C4 connected to the secondary side of the transformer Tr2.

  The microcomputer 35 turns on the LED 14 by the constant lighting circuit 30 and the lighting control circuit 33 and charges the battery 17 by the charging circuit 27 based on the supply detection of the commercial power source e obtained from the power supply monitoring circuit 24.

  In the event of a power failure of the commercial power source e, the LED 17 is lit by the emergency lighting circuit 28 using the battery 17 as a power source.

  Further, when the LED 14 is always lit by the commercial power source e, the component life detection means 52 of the microcomputer 35 integrates the time during which the electrolytic capacitor C2 is energized, and the integrated value does not reach the predetermined specified time. Or the ripple component included in the DC voltage converted from AC does not exceed a threshold value that is greater than the initial value, or whether the temperature of the electrolytic capacitor C2 exceeds a certain threshold value, etc. The characteristic change is monitored to determine the life of the electrolytic capacitor C2.

  After the life of the electrolytic capacitor C2 is detected by the component life detection means 52, the lighting of the LED 14 by the always-on circuit 30 is stopped, the LED 14 is turned off, and the charging of the battery 17 by the charging circuit 27 is stopped. Discharge 17 power.

  It is possible to notify that an abnormality has occurred in the guide light 11 by turning off the LED 14, and it is also possible to notify that there is no abnormality in the battery 17 or the LED 14 by the charge monitor 42 and the lamp monitor 43 of the guide light 11, and parts of the emergency lighting device 16 It is possible to notify that the electrolytic capacitor C2 is at the end of its life.

  To stop both the constant lighting circuit 30 and the charging circuit 27, which are large loads for the electrolytic capacitor C2 that has reached the end of its life, to discharge the power of the battery 17, and to function as the power source after the battery 17 has been discharged Therefore, it is possible to reduce the burden on the electrolytic capacitor C2 and suppress the deterioration, and to prevent the occurrence of an abnormality such as the evaporation gas of the electrolytic solution of the electrolytic capacitor C2 being ejected.

  When the life of the battery 17 is inspected, the inspection mode is selected by operating the inspection switch 40 or by remote operation with a remote controller. When the inspection mode is selected, the microcomputer 35 forcibly stops the constant lighting circuit 30 and the emergency lighting circuit 28 turns on the LED 14 with the battery 17 as a power source, and the LED 14 maintains a predetermined luminous flux. Then, it is inspected whether it lights up for a predetermined time (for example, 20 minutes) or longer. If the inspection is satisfied, the battery 17 is normal. If the inspection is not satisfied, the battery 17 has a lifespan and needs to be replaced.

  After the component life detecting means 52 detects the component life, the microcomputer 35 prohibits the inspection mode even if the inspection mode is selected. For this reason, it is possible to prevent the LED 14 from being turned on in the inspection mode and misleading that the guide light 11 is normal.

  In addition, after the component life detection means 52 detects the component life, the control means 51 holds the information that the component life detection means 52 has detected the component life even when the commercial power source e fails or when the commercial power source e is cut off. In addition, even if the commercial power source e is turned on again after a power failure of the commercial power source e or after the commercial power source e is cut off, the stop state of the always-on circuit 30 is maintained. As a result, it is possible to prevent the LED 14 from being turned on due to the reactivation of the commercial power source e and being misidentified as not reaching the component life.

  The component for detecting the lifetime is not limited to the electrolytic capacitor C2 for smoothing, and other components having a short lifetime among the components used in the emergency lighting device 16 may be used.

It is a circuit diagram of an emergency lighting device showing an embodiment of the present invention. It is a perspective view of the decomposition | disassembly state of the guide light using an emergency lighting device same as the above.

14 LED as light source
16 Emergency lighting device
17 battery
27 Charging circuit
28 Emergency lighting circuit
30 Constant lighting circuit
51 Control means
52 Component life detection means

Claims (4)

A constant lighting circuit that constantly lights the light source with a commercial power supply;
A battery that serves as a power source in the event of a commercial power failure,
A charging circuit for charging the battery with a commercial power source;
An emergency lighting circuit that turns on the light source using the battery as a power source when a commercial power failure occurs;
Component life detection means for detecting the component life;
After the component life detecting means detects the component life, the light source lighting by the always-on circuit is stopped, the battery charging by the charging circuit is stopped, and the battery power is discharged. An emergency lighting device characterized in that The control means permits the lighting of the light source with the battery as a power source by the emergency lighting circuit to discharge the battery power.
The emergency lighting device according to claim 1. The control means shall be able to select the inspection mode in which the light source is turned on with the battery as the power source by the emergency lighting circuit, and the inspection mode shall be prohibited after the part life detection means detects the part life. The emergency lighting device according to claim 1 or 2 . Control means, after the component life detecting means detects the component lifetime, commercial power supply be turned on again, according to claim 1 or 3 further characterized in that to maintain the stopped state of constant lighting circuit and the charging circuit Emergency lighting device.

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