JP6186659B2 - Emergency lighting system - Google Patents

Description

  The present invention relates to emergency lighting devices such as guide lights and emergency lights.

  Conventional emergency lighting devices include an emergency lamp using a halogen bulb as a light source and a guide lamp using a cold cathode discharge lamp as a light source (see, for example, Patent Document 1).

  In recent years, an emergency lighting device using a light emitting diode (LED) as a light source has been developed in place of a halogen bulb or a cold cathode discharge lamp (see, for example, Patent Document 2). That is, the LED can obtain the same amount of light with less power than a halogen bulb or a cold cathode discharge lamp. For example, the battery capacity of the storage battery, which is an emergency power supply, is reduced, Miniaturization can be achieved. In addition, since the LED, which is the light source, is also relatively small, it is possible to reduce the size of the entire emergency lighting device such as a guide light or an emergency light.

  In addition, the emergency lighting device must have a function (inspection function) for forcibly feeding power from the emergency power supply (storage battery) and turning on the light source even when the power system is not interrupted. In other words, in Japan, the above inspections are obliged to be carried out every 6 months under the fire-fighting laws for guide lights and the building standards for emergency lights.

JP 2008-34401 A JP 2007-173061 A

  By the way, as in the conventional example described in Patent Document 1, an emergency lighting device using a cold cathode discharge lamp as a light source is a lighting circuit that turns on the light source in the event of a power failure. It is necessary to provide an inverter circuit that converts power. Further, as in the conventional example described in Patent Document 2, an emergency lighting device using an LED as a light source converts, as a lighting circuit, DC power supplied from an emergency power source into DC power of a desired voltage and stabilizes it. It is necessary to provide a power supply circuit.

  However, at the time of the above inspection, since the lighting circuit is operated in a state where the power system is not interrupted, noise that leaks from the emergency lighting device to the power system due to the effects of switching noise generated in the lighting circuit (noise terminal voltage) ) Will also increase. In particular, an emergency lighting device using an LED as a light source has an electric wire for connecting a lighting circuit to a storage battery (emergency power supply) and a primary circuit electrically connected to an electric power system in order to reduce the size. It is difficult to increase the distance, and the noise terminal voltage tends to increase.

  The present invention has been made in view of the above problems, and an object thereof is to suppress an increase in noise during inspection while achieving downsizing.

  The emergency lighting device of the present invention includes a power conversion unit that converts AC power supplied from a power system into desired DC power, an emergency power source having a storage battery, and DC power output from the power conversion unit. A charging circuit for charging an emergency power supply, a light source composed of a solid state light emitting element, a lighting circuit that is powered from the emergency power supply to turn on the light source, and operates the lighting circuit when the power system is out of power A control circuit that turns on the light source, and the power conversion unit, the emergency power supply, the charging circuit, the light source, the lighting circuit, and a housing that houses the control circuit therein, the power conversion unit Is a rectifying circuit for rectifying an AC voltage / AC current supplied from the power system, an insulating transformer connected to the primary winding of the rectifying circuit, and a voltage applied to the primary winding of the insulating transformer・ Electric A switching element that intermittently interrupts the voltage and current induced in the secondary winding of the insulation transformer and outputs the DC power by rectifying and smoothing the voltage and current. Comprising a switching power supply circuit that converts the DC power supplied from the emergency power supply into a desired DC power and outputs the DC power, and the control circuit is forced to operate when the power system is not out of power. The power conversion unit and the lighting circuit are configured to perform an inspection operation for operating the lighting circuit to light the light source, and the power conversion unit and the lighting circuit are circuit components including the insulating transformer and the semiconductor switching element on one printed wiring board. The printed wiring board is mounted on the primary side region on the primary winding side with respect to the center of the insulating transformer. A circuit component constituting the lighting circuit is mounted in a secondary region on the secondary winding side with respect to the center, and one end of an electric wire is connected to a wiring conductor in the secondary region And the other end of the electric wire is connected to the emergency power source, the electric wire is drawn to the surface side of the printed wiring board, and the secondary region of the printed wiring board The emergency power supply is housed in the housing so as to face the back surface of the printed wiring board and connected to the electric wire inserted through the insertion portion. And

  In this emergency lighting device, a connector is provided at the tip of the electric wire, a mating connector connected to the connector is provided in the emergency power supply, and the connector is inserted into the insertion portion in the state where the connector is inserted. It is preferably supported by a printed wiring board.

  The emergency lighting device of the present invention is housed in the housing so that the emergency power supply faces the back surface of the printed wiring board, the electric wires are drawn out to the front side of the printed wiring board, and the secondary side of the printed wiring board. Since it is inserted into the insertion portion provided in the region and connected to the emergency power supply on the back side of the printed wiring board, the distance between the primary region in the printed wiring board and the electric wire can be increased. As a result, it is possible to suppress an increase in noise during inspection while reducing the size of the housing.

It is sectional drawing which shows embodiment of the emergency illuminating device which concerns on this invention. It is a perspective view which shows the power supply unit and emergency power supply in the same as the above. It is a circuit diagram same as the above. It is sectional drawing which shows another embodiment of the emergency illuminating device which concerns on this invention.

  Hereinafter, an embodiment of an emergency lighting device according to the present invention will be described in detail with reference to the drawings. In addition, although the emergency lighting apparatus of this embodiment is comprised as an emergency light, it may be a guide light.

  In the following description, unless otherwise specified, the vertical and horizontal directions in FIG. 1 are respectively defined as vertical and horizontal directions, and the direction perpendicular to the paper surface is defined as the longitudinal direction.

  As shown in FIG. 1, the emergency lighting device of the present embodiment includes an LED module 1, a power supply unit 2, an emergency power supply 3, a terminal block 4, a housing 5, and the like.

  The LED module 1 is configured by mounting a plurality of light emitting diodes (LEDs) 10 on the lower surface of a disk-shaped substrate 11. Further, the lead wire 12 is drawn out to the upper surface side of the substrate 11, and the plug connector 13 provided at the tip of the lead wire 12 is connected to the output connector 28 of the power supply unit 2. Each LED 10 emits light (lights up) when DC power is supplied from the power supply unit 2 to the LED module 1 via the lead wire 12.

  The emergency power supply 3 is configured such that a plurality of storage batteries 31 (see FIG. 3) are housed in a cylindrical case 30 and a receptacle connector 32 protrudes upward from the upper surface of the case 30. The storage battery 31 is connected in series in the case 30 and a pair of contacts (not shown) of the receptacle connector 32 are connected to the series circuit of the storage battery 31.

  The terminal block 4 has a conventionally known fast-connection terminal structure, and is connected to an AC power system 6 by a power line (not shown) and connected to the power unit 2 by an input line 40 as will be described later. The

  The housing 5 is formed in a bottomed cylindrical shape whose lower end is opened by aluminum die casting. The housing 5 houses the LED module 1, the power supply unit 2, the emergency power supply 3, and the terminal block 4, and the LED module 1 closes the opening at the lower end. In the housing 5, the emergency power supply 3 and the terminal block 4 are arranged in the vertical direction with the terminal block 4 facing upward, and the power supply unit 2, the emergency power supply 3 and the terminal block 4 are horizontal. Arranged in a direction (left-right direction). As shown in FIG. 1, the housing 5 is embedded in an embedded hole 70 provided in the ceiling material 7.

  As shown in FIG. 3, the power supply unit 2 includes a power conversion unit 20, a charging circuit 21, a lighting circuit 22, a control circuit 23, a filter circuit 24, and the like.

  The filter circuit 24 removes harmonic noise from the AC voltage / AC current supplied from the power system 6.

  The power converter 20 includes a rectifier circuit 200 composed of a diode bridge, a smoothing capacitor 201 that smoothes the pulsating voltage output from the rectifier circuit 200, and a DC voltage smoothed by the smoothing capacitor 201 is stepped down to a desired DC voltage and output. An insulation type DC-DC converter.

  The insulation type DC-DC converter includes an insulation transformer 202, a semiconductor switching element 203, diodes 204 and 205, a choke coil 206, a smoothing capacitor 207, and the like. In the insulation transformer 202, one end of the primary winding 2021 is connected to the high potential side of the smoothing capacitor 201, and the other end of the primary winding 2021 is connected to the collector of the semiconductor switching element 203 (bipolar transistor). The emitter of the semiconductor switching element 203 is connected to the low potential side of the smoothing capacitor 201.

  A series circuit of a diode 204, a choke coil 206 and a smoothing capacitor 207 is connected to the secondary winding 2022 of the insulating transformer 201. A diode 205 is connected in parallel to the choke coil 206 and the smoothing capacitor 207. Then, the semiconductor switching element 203 is subjected to switching control by a drive circuit (not shown), and the direct current voltage applied to the primary winding 2021 of the insulating transformer 201 is interrupted at a high frequency. As a result, a DC voltage that is stepped down from a DC voltage applied (input) to the primary winding 2021 of the insulating transformer 201 is applied to the output-side smoothing capacitor 207 and output to the lighting circuit 21. The insulated DC-DC converter configured in this way is conventionally known as an insulated forward converter, and therefore detailed description of the circuit operation is omitted.

  The charging circuit 21 and the storage battery 31 of the emergency power supply 3 are connected in series to the output terminal of the power conversion unit 20 (the output terminal of the smoothing capacitor 207), and the lighting circuit 22 is connected in parallel to the storage battery 31. The charging circuit 21 is configured to charge the storage battery 31 with DC power supplied from the power conversion unit 20.

  The lighting circuit 22 is configured by a switching power supply circuit including an insulating transformer 220 and a semiconductor switching element 221 (see FIGS. 1 and 2), similarly to the power conversion unit 20. However, since such a switching power supply circuit is conventionally known, a detailed description of the circuit configuration and circuit operation is omitted.

  For example, the control circuit 23 detects a power failure of the power system 6 based on the output of the charging circuit 21 and controls the semiconductor switching element to operate the lighting circuit 22 while the power system 6 is out of power. Further, the control circuit 23 is configured to operate the lighting circuit 22 without detecting a power failure of the power system 6 when an inspection start signal is input by operating an inspection switch (not shown).

  That is, when power is supplied from the power system 6, the power conversion unit 20 and the charging circuit 21 operate to charge the storage battery 31, and the control circuit 23 stops the lighting circuit 22. When power supply to the power system 6 is stopped (power failure), the power conversion unit 20 and the charging circuit 21 are stopped, and the control circuit 23 operates the lighting circuit 22 to light the LED 10. Further, when the inspection switch is operated, the control circuit 23 operates the lighting circuit 22 in a state where the power conversion unit 20 and the charging circuit 21 are forcibly stopped, and the LED 10 is lit (inspection operation). Note that the control circuit 23 starts a timer from the time when the inspection start signal is input and the operation of the lighting circuit 22 is started, and counts the elapsed time until the remaining capacity of the storage battery 31 falls below a predetermined threshold value. If the remaining capacity of the storage battery 31 does not fall below the threshold before the elapsed time reaches the specified time (30 minutes or 60 minutes), the control circuit 23 determines that the emergency power supply 3 is normal. On the other hand, if the remaining capacity of the storage battery 31 falls below the threshold before the elapsed time reaches the specified time, the control circuit 23 determines that the emergency power supply 3 is abnormal. Then, the control circuit 23 notifies the inspection result (normality or abnormality of the emergency power supply 3) using a display element or the like.

  Further, as shown in FIGS. 1 and 2, the power supply unit 2 includes circuit components constituting the power conversion unit 20, the charging circuit 21, the lighting circuit 22, the control circuit 23, and the filter circuit 24 as printed circuit boards 25. Implemented and configured.

  The printed wiring board 25 has a wiring conductor (copper foil) printed on the back surface (left side surface in FIG. 1) of a rectangular insulating substrate (for example, a glass epoxy substrate). The printed wiring board 25 has a number of through holes (not shown) through which the terminal pins of the circuit components are inserted in the thickness direction. In the circuit component, the terminal pin is inserted into the through hole from the front surface (right side surface in FIG. 1) side of the printed wiring board 25 and soldered to the conductor on the back surface side of the printed wiring board 25. In FIG. 1 and FIG. 2, only main circuit components are shown, and some of the circuit components are not shown.

  Here, the insulating transformer 201 of the power conversion unit 20 has a pair of primary terminal pins 2023 connected to the primary winding 2021 on the upper side as shown in FIG. A pair of secondary terminal pins 2024 are mounted on the printed wiring board 25 so as to be disposed on the lower side. In the printed wiring board 25, a filter circuit 24 and a rectifier are provided in a region (hereinafter referred to as a primary side region) above the center line Lc of the insulating transformer 201 (the side where the primary terminal pin 2023 is present). Circuit components such as the circuit 200, the smoothing capacitor 201, and the semiconductor switching element 203 are mounted. In the printed wiring board 25, diodes 204 and 205 are disposed in a region (hereinafter referred to as a secondary region) below the center line Lc of the insulating transformer 201 (the side where the secondary terminal pin 2024 is present). Circuit components such as the choke coil 206 and the smoothing capacitor 207 are mounted. Furthermore, circuit components (such as an insulation transformer 220) that constitute the charging circuit 21, the lighting circuit 22, and the control circuit 23 are also mounted in the secondary region. That is, in the printed wiring board 25, circuit components constituting a circuit from the input connector 27 to the primary winding 2021 of the insulation transformer 201 are mounted in the primary region, and the secondary winding 2022 of the insulation transformer 201 is output from the output connector. Circuit components constituting circuits up to 28 are mounted in the secondary region.

  Furthermore, an insertion portion 250 made of a rectangular notch is provided in the secondary region of the printed wiring board 25 (see FIG. 2). Further, a pair of electric wires 26 for connecting the power unit 2 and the emergency power supply 3 are led out from the secondary region of the printed wiring board 25. These electric wires 26 are inserted into through-holes in the secondary region, connected at one end to the wiring conductor, and drawn out to the surface side of the printed wiring board 25. These electric wires 26 are provided with a plug connector 260 connected to the receptacle connector 32 of the emergency power supply 3 at the other end.

  As shown in FIG. 1, the pair of electric wires 26 is drawn through the insertion portion 250 to be drawn to the non-mounting surface side of the printed wiring board 25, and the plug connector 260 is connected to the receptacle connector 32 of the emergency power supply 3. The As a result, a charging current is supplied from the charging circuit 21 to the emergency power source 3 through the electric wire 26, and a discharging current is supplied from the emergency power source 3 to the lighting circuit 22.

  Here, at the time of inspection, since the high-frequency current flows through the electric wire 26 due to the operation of the lighting circuit 22, noise due to the high-frequency magnetic field generated around the electric wire 26 leaks from the input connector 27 to the power system 6. However, in the power supply unit 2 in the present embodiment, the electric wire 26 is inserted into the insertion portion 250 provided in the secondary region of the printed wiring board 25. Therefore, compared with the case where the electric wire 26 is routed to the non-mounting surface side through the primary side region, the distance between the primary side region and the electric wire 26 can be increased. As a result, while the power supply unit 2 and the emergency power supply 3 are stored next to each other in a narrow space in the housing 5, an increase in noise (noise terminal voltage) leaking from the input connector 27 to the power system 6 during inspection is suppressed. Can do.

  As described above, the emergency lighting device according to the present embodiment includes the power conversion unit 20 that converts AC power supplied from the power system 6 into desired DC power, the emergency power source 3 including the storage battery 31, and the power conversion unit. And a charging circuit 21 that charges the emergency power supply 3 with DC power output from the power supply 20. In this emergency lighting device, the light source (LED module 1) composed of a solid state light emitting element (light emitting diode 10), the lighting circuit 22 that is supplied with power from the emergency power source 3 and lights the light source, and the power system 6 are cut off. And a control circuit 23 that operates the lighting circuit 22 to light the light source. The emergency lighting device further includes a housing 5 that houses therein a power conversion unit 20, an emergency power source 3, a charging circuit 21, a light source 1, a lighting circuit 22, and a control circuit 23.

  The power converter 20 includes a rectifier circuit 200 that rectifies an AC voltage / AC current supplied from the power system 6, an isolation transformer 202 in which the rectifier circuit 200 is connected to the primary winding 2021, and a primary of the isolation transformer 202. And a semiconductor switching element 203 for intermittently applying a voltage / current applied to the winding 2021. The power conversion unit 20 is configured to output DC power by rectifying and smoothing the voltage / current induced in the secondary winding 2022 of the insulating transformer 202.

  The lighting circuit 22 includes a semiconductor switching element, and includes a switching power supply circuit that converts DC power supplied from the emergency power supply 3 into desired DC power and outputs the DC power. The control circuit 23 is configured to perform an inspection operation for forcibly operating the lighting circuit 22 and lighting the light source (LED module 1) when the power system 6 is not out of power. The power conversion unit 20 and the lighting circuit 22 are configured by mounting circuit components including an insulating transformer 202 and a semiconductor switching element 203 on one printed wiring board 25. In the printed wiring board 25, a rectifier circuit 200 and a semiconductor switching element 203 are mounted in a primary region on the primary winding side with respect to the center (center line Lc) of the insulating transformer 202. The printed wiring board 25 is mounted with circuit components constituting the lighting circuit 22 in the secondary region on the secondary winding side with respect to the center, and one end of the electric wire 26 is connected to the wiring conductor in the secondary region. And the other end of the electric wire 26 are connected to the emergency power source 3.

  The electric wire 26 is drawn out to the surface side of the printed wiring board 25 and is inserted into the insertion portion 250 provided in the secondary side region of the printed wiring board 25. The emergency power supply 3 is housed in the housing 5 so as to face the back surface of the printed wiring board 25 and connected to the electric wire 26 inserted through the insertion portion 250.

  According to the above configuration, since the distance between the primary side region of the printed wiring board 25 and the electric wire 26 can be increased, an increase in noise during inspection can be suppressed while the size of the housing 5 is reduced. In the present embodiment, the insertion portion 250 is notched, but a through hole that penetrates the printed wiring board 25 in the thickness direction may be provided to form the insertion portion 250.

  Here, as shown in FIG. 4, the plug connector 260 may be configured to be supported by the printed wiring board 25 while being inserted into the insertion portion 250. With this configuration, it is not necessary to use another member for fixing the plug connector 260, and the number of parts can be reduced.

1 LED module (light source)
2 Power supply unit (power converter, charging circuit, lighting circuit)
3 Emergency power supply 5 Housing 6 Power system
10 Light emitting diode (solid state light emitting device)
23 Control circuit
25 Printed wiring board
26 Electric wire
202 Isolation transformer
203 Semiconductor switching element
250 Insertion Lc Center line (center of insulation transformer)

Claims (2)

A power conversion unit that converts AC power supplied from the power system into desired DC power, an emergency power source having a storage battery, and a charging circuit that charges the emergency power source with DC power output from the power conversion unit; A light source comprising a solid-state light emitting element; a lighting circuit that is powered from the emergency power supply to turn on the light source; and a control circuit that operates the lighting circuit to turn on the light source when the power system is out of power And a housing that houses the power conversion unit, the emergency power supply, the charging circuit, the light source, the lighting circuit, and the control circuit inside,
The power converter includes a rectifier circuit that rectifies an AC voltage / AC current supplied from the power system, an insulating transformer in which the rectifier circuit is connected to a primary winding, and a primary winding of the insulating transformer. A semiconductor switching element that intermittently applies the applied voltage / current, and is configured to output the DC power by rectifying and smoothing the voltage / current induced in the secondary winding of the isolation transformer,
The lighting circuit includes a switching power supply circuit that includes a semiconductor switching element, converts the direct current power supplied from the emergency power source into desired direct current power, and outputs the desired direct current power.
The control circuit is configured to perform an inspection operation for forcibly operating the lighting circuit to light the light source when the power system is not out of power,
The power conversion unit and the lighting circuit are configured by mounting circuit components including the insulating transformer and the semiconductor switching element on one printed wiring board,
In the printed wiring board, the rectifier circuit and the semiconductor switching element are mounted in a primary region on the primary winding side with respect to the center of the insulating transformer, and the secondary winding side with respect to the center. A circuit component constituting the lighting circuit is mounted in the secondary side region, and one end of the electric wire is connected to the wiring conductor in the secondary side region and the other end of the electric wire is connected to the emergency power source. Configured to
The electric wire is drawn out to the surface side of the printed wiring board, and is inserted into an insertion portion provided in the secondary side region of the printed wiring board,
The emergency lighting device, wherein the emergency power supply is housed in the housing so as to face the back surface of the printed wiring board and is connected to the electric wire inserted through the insertion portion.   A connector is provided at the tip of the electric wire, a mating connector connected to the connector is provided in the emergency power supply, and the connector is supported by the printed wiring board in a state of being inserted into the insertion portion. The emergency lighting device according to claim 1.

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