JP2021174611A - Emergency device, lighting fixture - Google Patents

Abstract

To provide an emergency device and a lighting fixture which are suitable for being miniaturized and are suppressed in power consumption when a storage battery is charged.SOLUTION: An emergency device comprises: a storage battery that is supplied with charging current from an AC-DC conversion circuit converting AC voltage to DC voltage; a current supply circuit that uses the storage battery as a power source to supply current to an emergency fixture; and a control unit that is supplied with power from the AC-DC conversion circuit and controls the AC-DC conversion circuit and the current supply circuit, the AC-DC conversion circuit includes: a resistance element located at the output of a DC generation circuit and connected in series to the storage battery; and a short-circuit switch element connected in parallel to the resistance element, and under the control of the control unit, the storage battery is charged with the short-circuit switch element turned off at least when the AC voltage is applied, and then the storage battery is charged with the short-circuit switch element turned on.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to emergency equipment and lighting equipment.

Among lighting fixtures that use LEDs (Light Emitting Diodes) as a light source, emergency lighting fixtures or guide lights that are supposed to be turned on in the event of a power outage due to a disaster or the like use the power of a built-in storage battery to light the LEDs. By charging the storage battery with the energy input from the AC power supply in normal times when no power failure occurs, it is possible to turn on the LED for a long time during a power failure.

Patent Document 1 describes an emergency lighting fixture that charges a storage battery, which is an emergency power source during normal times when an AC power source is normally obtained, and lights a light source using the power of the storage battery during an emergency when a power failure occurs. It is disclosed.

Japanese Unexamined Patent Publication No. 2008-166165

The circuit used for emergency lighting equipment includes a flyback type switching regulator that converts alternating current into direct current to obtain a direct current voltage, a lighting circuit for lighting an LED, and a charging circuit for charging a storage battery. Therefore, there are problems that the number of parts is large as compared with other lighting fixtures having the same output, the shape of the fixture is large, and the cost is high. Further, since the storage battery is charged from the flyback type switching regulator via the charging circuit, there is a problem that power loss occurs in the charging circuit and the power consumption increases during charging of the storage battery.

The present disclosure has been made in order to solve the above-mentioned problems, and an object of the present disclosure is to provide an emergency device and a lighting fixture which are suitable for miniaturization and suppress power consumption when charging a storage battery.

The emergency device according to the present disclosure includes an AC-DC conversion circuit that converts an AC voltage into a DC voltage, a storage battery that receives charging current from the AC-DC conversion circuit, and a current that supplies current to the emergency equipment using the storage battery as a power source. The AC-DC conversion circuit includes a current supply circuit that supplies the current, and a control unit that receives power from the AC-DC conversion circuit and controls the AC-DC conversion circuit and the current supply circuit. A rectifying circuit, a DC generation circuit that generates a DC voltage by charging and discharging energy with a switching element and an inductor or a transformer, a resistance element arranged at the output of the DC generation circuit and connected in series with the storage battery, and the resistor. It has a short-circuit switch element connected in parallel with the element, and under the control of the control unit, the storage battery is charged with the short-circuit switch element turned off at least when the AC voltage is applied, and then the short-circuit switch element is charged. The storage battery is charged with the power turned on.

Other features of the disclosure are clarified below.

According to the present disclosure, since the storage battery is directly charged by the AC-DC conversion circuit, a separately provided charging circuit becomes unnecessary, the entire device and lighting equipment can be made compact and low cost, and the power consumption when charging the storage battery can be reduced. It can be suppressed.

It is a circuit block diagram of the emergency apparatus which concerns on Embodiment 1. FIG. It is a circuit block diagram of the emergency apparatus which concerns on Embodiment 2. FIG. It is a timing chart of control which concerns on Embodiment 3. It is a circuit block diagram of the emergency apparatus which concerns on Embodiment 4. FIG. It is a circuit block diagram of the emergency apparatus which concerns on Embodiment 5. It is a figure which shows the internal structure of a luminaire.

The emergency device and the lighting fixture according to the embodiment will be described with reference to the drawings. The same or corresponding components may be designated by the same reference numerals and the description may be omitted. The emergency devices and luminaires of the embodiments are not limited.

Embodiment 1.
FIG. 1 is a circuit configuration diagram of the emergency device 100 according to the first embodiment. The emergency device 100 receives power from the AC power supply 1 to charge the storage battery BT, and supplies power to the emergency equipment 10 from the storage battery BT in the event of a power failure of the AC power supply 1. In this example, the emergency device 10 is a light source. An example of a light source is an LED (Light Emitting Diode). The emergency device 100 includes an AC-DC conversion circuit 2, an AC-DC conversion circuit control unit 3, a current supply circuit 4, and a lighting circuit control unit 5. The AC-DC conversion circuit control unit 3 and the lighting circuit control unit 5 can also be provided as one control unit. These may be collectively referred to as a control unit.

The AC-DC conversion circuit 2 is provided as a circuit that converts an AC voltage into a DC voltage. According to one example, the AC-DC conversion circuit 2 includes a rectifier circuit DB composed of a diode bridge and a DC generation circuit. A DC generation circuit is a circuit that generates a DC voltage by charging and discharging energy with a switching element and an inductor or transformer. In the example of FIG. 1, a flyback converter is provided as a DC generation circuit. The flyback converter includes a capacitor C1, a transformer T1, a switching element SW1, a diode D1, and a smoothing capacitor C2. The voltage that is full-wave rectified from the AC power supply 1 via the rectifier circuit DB is converted into electric power by the flyback converter. The DC output side of the rectifier circuit DB has a power supply detection resistor R1 for detecting the presence or absence of a power failure of the AC power supply, and the detection signal of the power supply detection resistor R1 is input to the lighting circuit control unit 5.

The AC-DC conversion circuit 2 operates under the control of the AC-DC conversion circuit control unit 3. When the switching element SW1 is turned on, a current flows through the primary winding N1 of the transformer T1 and energy is stored in the transformer T1. When the switching element SW1 is turned off, the energy stored in the transformer T1 is released from the secondary winding N2 of the transformer T1 to the storage battery BT side.

The AC-DC conversion circuit 2 has a resistance element R2 and a short-circuit switch element SW2 connected in parallel with the resistance element R2 between the smoothing capacitor C2 and the storage battery BT. The resistance element R2 is arranged at the output of the DC generation circuit and is connected in series with the storage battery BT. The short-circuit switch element SW2 operates on and off based on a command from the lighting circuit control unit 5. The short-circuit switch element SW2 can be composed of, for example, a semiconductor switch such as a MOSFET or another transistor.

The AC-DC conversion circuit control unit 3 has a means for reading the current flowing through the storage battery BT from the current detection resistor R4. The AC-DC conversion circuit control unit 3 operates by receiving power supplied from the DC output side of the rectifier circuit DB. The AC-DC conversion circuit control unit 3 may perform a power factor improving operation as necessary. That is, the power factor is improved by controlling the switching element SW1 so that the input current waveform of the emergency device 100 has a sinusoidal shape and is substantially in phase with the voltage of the AC power supply 1. At this time, the capacitor C1 is not used for DC smoothing the commercial frequency component of the AC power supply 1, but is used as a filter capacitor for removing switching ripples.

The current supply circuit 4 is composed of a step-up chopper circuit, and includes a step-up reactor L1, a switching element SW3, a diode D3, and a capacitor C3. The current supply circuit 4 operates under the control of the lighting circuit control unit 5. When the switching element SW3 is turned on, a current flows from the storage battery BT to the booster reactor L1 and energy is stored in the booster reactor L1. When the switching element SW3 is turned off, the energy stored in the step-up reactor L1 is released to the capacitor C3 and the emergency equipment 10 side via the diode D3. At this time, since a voltage obtained by superimposing the DC voltage of the storage battery BT on the counter electromotive force generated in the booster reactor L1 is applied to the capacitor C3, a voltage higher than the voltage of the storage battery BT is generated, and the emergency equipment 10 is equipped with a voltage higher than that of the storage battery BT. It is applied.

The current supply circuit 4 has a light source current detection resistor R5 connected in series with the emergency device 10. The lighting circuit control unit 5 monitors the current detection signal detected by the light source current detection resistor R5, adjusts the on-time of the switching element SW3 so that the current flowing through the emergency equipment 10 becomes a desired direct current, and sets it. Perform current control. Further, the lighting circuit control unit 5 receives a voltage detection signal from the storage battery voltage detection resistor R3 that detects the charging voltage of the storage battery BT, and monitors the voltage of the storage battery BT. The lighting circuit control unit 5 operates by receiving power supplied from the output of the AC-DC conversion circuit 2.

Next, the operation of the emergency device 100 according to the first embodiment will be described. First, a case where the AC power supply 1 is applied to the emergency device 100 in a situation where the storage battery BT is not sufficiently charged with energy will be described. When the AC power supply 1 is applied to the emergency device 100, the rectifier circuit DB full-wave rectifies the input AC voltage, and the rectified voltage is applied to both ends of the capacitor C1. Power is supplied to the AC-DC conversion circuit control unit 3 by the rectified DC voltage, and the AC-DC conversion circuit 2 starts operation. As a result, the switching element SW1 operates on and off, a voltage is induced in the secondary winding N2 of the transformer T1, and a DC voltage is generated in the smoothing capacitor C2. The storage battery BT receives a charging current from the AC-DC conversion circuit 2.

When the AC-DC conversion circuit 2 is started, the short-circuit switch element SW2 is in the off state, and the voltage of the smoothing capacitor C2 is mainly applied to the resistance element R2 and the storage battery BT. The AC-DC conversion circuit control unit 3 monitors the current detection signal of the current detection resistor R4, adjusts the on-time of the switching element SW1 so that the charging current to the storage battery BT becomes a predetermined current value, and determines it. The storage battery BT is charged by current control. That is, the control unit controls the charging current obtained by the current detection resistor R4 to approach a predetermined value. Further, the voltage of the smoothing capacitor C2 is also applied to the lighting circuit control unit 5, so that the driving power is supplied to the lighting circuit control unit 5. As a result, the lighting circuit control unit 5 starts operation. However, while the AC power supply 1 is turned on, the lighting circuit control unit 5 maintains the operation of the current supply circuit 4 in the stopped state. Therefore, the emergency equipment 10 is turned off.

The lighting circuit control unit 5 monitors the storage battery voltage by the storage battery voltage detection resistor R3, and when a certain time elapses from the start of charging, the storage battery voltage rises and reaches a reference voltage predetermined by a program or the like, a short circuit occurs. The switch element SW2 is controlled to be in the ON state. As a result, the output current of the AC-DC conversion circuit 2 does not flow through the resistance element R2, and the storage battery BT is charged via the short-circuit switch element SW2. The method of detecting the storage battery voltage is not limited to the storage battery voltage detection resistor R3. For example, the lighting circuit control unit 5 counts the elapsed time from the start of charging, and the storage battery voltage rises when a predetermined time elapses. The short-circuit switch element SW2 may be turned on. According to another example, the control unit turns on the short-circuit switch element SW2 when the voltage of the storage battery BT rises from the time when the AC voltage is applied.

Here, the significance of using the resistance element R2 and the short-circuit switch element SW2 will be described. In the energy discharge state in which the storage battery BT is not sufficiently charged, the voltage of the storage battery BT is lower than that in the energy fully charged state. In this state, assuming that there is no resistance element R2 and short-circuit switch element SW2 and the output of the AC-DC conversion circuit 2 is directly connected to the storage battery BT, the storage battery has a constant voltage characteristic, so that the AC-DC conversion circuit 2 The output voltage of is the same as the battery voltage of the storage battery BT. Therefore, the output voltage of the AC-DC conversion circuit 2 is in a low voltage state.

Since the output voltage of the AC-DC conversion circuit 2 also serves as a drive power source for the lighting circuit control unit 5, if the output voltage of the AC-DC conversion circuit 2 is low, it is input to the lighting circuit control unit 5. The voltage also becomes low, and the lighting circuit control unit 5 cannot be started. From the above, in the state where the storage battery BT is not sufficiently charged with energy or in the over-discharged state, the output voltage of the AC-DC conversion circuit 2 drops, and the lighting circuit that drives the current supply circuit 4 accompanies this. The drive power is not normally supplied to the control unit 5, and the emergency device 100 cannot operate normally.

Therefore, when the storage battery BT is in an over-discharged state or the like, the charging current to the storage battery BT is made to flow through the resistance element R2. A voltage determined by the product of the resistance value of the resistance element R2 and the charging current is generated in the resistance element R2, and the output voltage of the AC-DC conversion circuit 2 is a value obtained by superimposing the generated voltage of the resistance element R2 on the voltage of the storage battery BT. It becomes. Therefore, the output voltage of the AC-DC conversion circuit 2 can be increased as compared with the case where the resistance element R2 is not provided. As a result, when the AC power supply 1 is turned on, a normal control power supply can be supplied to the lighting circuit control unit 5 even when the storage battery voltage is low.

Further, when the storage battery voltage is sufficiently increased by the charging operation of the storage battery BT, if the resistance element R2 is short-circuited by the short-circuit switch element SW2, the power loss generated in the resistance element R2 can be reduced, and the emergency device in the charging current can be reduced. The power consumption can be reduced by 100. When a plurality of storage battery BTs are connected in series and a sufficient battery voltage can be secured even when the energy is not sufficiently charged, the resistance element R2 and the short-circuit switch element SW2 can be omitted as a matter of course.

In this way, under the control of the control unit, the storage battery BT is charged with the short-circuit switch element SW2 turned off, and then the storage battery BT is charged with the short-circuit switch element SW2 turned on, at least when the AC voltage is applied.

Next, the operation when the AC power supply 1 loses power for some reason will be described. When the AC power supply 1 loses power, the lighting circuit control unit 5 detects this due to the voltage drop of the power supply detection resistor R1 and starts the operation of the current supply circuit 4. When the current supply circuit 4 operates, the storage battery BT is used as a power source to supply a current to the emergency equipment 10, and the emergency equipment 10 lights up. Since the AC power supply 1 loses power, the AC-DC conversion circuit 2 stops operating. Therefore, since the drive control power supply of the lighting circuit control unit 5 cannot be obtained from the output of the AC-DC conversion circuit 2, the control power supply is supplied from the output of the current supply circuit 4 while the emergency equipment 10 is lit. In the example of FIG. 1, the output of the AC-DC conversion circuit 2 and the output of the current supply circuit 4 are connected to the diode OR by the diodes D4 and D5, respectively, and the control power is supplied to the lighting circuit control unit 5.

As described above, since the storage battery BT is directly charged by controlling the AC-DC conversion circuit 2 with a constant current without providing a separate charging circuit, the circuit can be simplified and the emergency device can be made compact and low. It can be a cost. In addition, it is possible to reduce the power loss due to the charging circuit that has been conventionally generated.

The charging current of the AC-DC conversion circuit 2 to the storage battery BT may be appropriately switched depending on the charging state of the storage battery BT. For example, the charging current may be increased at the initial stage of charging when the storage battery voltage is low, and may be reduced at the time of full charge or near full charge. In other words, the AC-DC conversion circuit 2 reduces the charging current to the storage battery BT when the voltage of the storage battery BT rises more than when the AC voltage is applied by the control of the control unit. The control unit controls the on-time of the switching element SW1 according to the value of the charging current supplied to the storage battery BT. According to another example, the AC-DC conversion circuit 2 reduces the charging current to the storage battery BT after the start of charging the storage battery BT. As a result, the power consumption of the emergency device 100 when fully charged can be reduced. The state of charge of the storage battery BT can be detected by the storage battery voltage detection resistor R3. When the storage battery voltage detection resistor R3 is used, although not shown, the storage battery voltage signal may be transmitted from the lighting circuit control unit 5 to the AC-DC conversion circuit control unit 3, or the signal voltage of the storage battery voltage detection resistor R3 may be transmitted. The AC-DC conversion circuit control unit 3 may directly monitor. According to another example, after the AC power supply 1 is turned on, the charging time is counted by the control unit, and the charging current can be reduced after a predetermined time has elapsed. Further, although not shown, the control power supply to the AC-DC conversion circuit control unit 3 and the lighting circuit control unit 5 is appropriately provided with a step-down means such as a resistor, a Zener diode or a 3-terminal regulator, or a voltage stabilizing means. You may go through.

In the present embodiment, the flyback converter system is applied to the AC-DC conversion circuit 2, and the primary winding N1 side and the secondary winding N2 side are electrically insulated by the transformer T1. Therefore, for example, when the signal of the power supply detection resistor R1 provided on the primary winding N1 side is transmitted to the lighting circuit control unit 5, or the signal of the current detection resistor R4 provided on the secondary winding side is transmitted to AC-. When transmitting to the DC conversion circuit control unit 3, the electric signal may be isolated and transmitted by using a photocoupler or the like as appropriate.

The emergency equipment 10 is not limited to the light source, but may be a guide light, a speaker, a flash device, or any other emergency equipment. When a speaker is adopted as the emergency equipment 10, the current supply circuit 4 supplies a current to the voice circuit for driving the speaker. By providing a voice circuit and a speaker, it is possible to provide an emergency device having a function of providing evacuation guidance by voice. The flash device is a device that guides evacuees by blinking a light source such as a xenon lamp. When a flash device is adopted, the current supply circuit 4 supplies a current to a lighting circuit for driving the flash device. Multiple current supply circuits can be connected in parallel to the storage battery BT to operate multiple emergency equipment with different functions, or one current supply circuit can be connected to multiple emergency equipment with different functions to operate. Is also good.

The modified example, modified example or alternative described in the first embodiment can be applied to the emergency device according to the following embodiment. The differences between the emergency device according to the following embodiment and the first embodiment will be mainly described.

Embodiment 2.
FIG. 2 is a circuit configuration diagram of the emergency device 101 according to the second embodiment. The current detection resistor R4 is provided so as to avoid the path through which the storage battery BT supplies the current to the emergency device 10. In this example, the current detection resistor R4 is connected in series with the ground line between the smoothing capacitor C2 and the storage battery BT.

In FIG. 1, a current detection resistor R4 is provided in the discharge path of the storage battery BT. Therefore, the discharge current from the storage battery BT passes through the current detection resistor R4 and becomes a power loss.

On the other hand, in the emergency device 101 according to the second embodiment, the current detection resistor R4 is connected in series with the storage battery BT, so that the charging current of the storage battery BT can be detected, and the current detection resistor R4 is the storage battery. Since it is not in the discharge path of the BT, there is no power loss due to the discharge current passing through the current detection resistor R4.

Embodiment 3.
FIG. 3 is a control timing chart according to the third embodiment. The control unit stops the operation of the switching element SW1 before turning on the short-circuit switch element SW2, and restarts the operation of the switching element SW1 after turning on the short-circuit switch element SW2.

When the short-circuit switch element SW2 is turned on, the voltage of the smoothing capacitor C2 fluctuates, and the operation of the AC-DC conversion circuit 2 tends to become unstable. Further, when the short-circuit switch element SW2 is turned on, the voltage stored in the smoothing capacitor C2 momentarily becomes slightly higher than the voltage of the storage battery BT, so that it is conceivable that an inrush current flows through the storage battery BT.

In order to suppress these adverse effects, as described above, the switching operation of the switching element SW1 is temporarily stopped at the timing of the load fluctuation caused by turning on the short-circuit switch element SW2. The stop period of the switching operation is, for example, several tens of μsec to several tens of msec.

Embodiment 4.
FIG. 4 is a circuit configuration diagram of the emergency device 102 according to the fourth embodiment. The short-circuit switch element SW2 is a normally-off type MOSFET. As a result, it is possible to prevent the charging current from flowing before the AC power is turned on and the control unit composed of a microcomputer or the like is driven. Any normal-off type switching element other than MOSFET can be used as the short-circuit switch element SW2.

Embodiment 5.
FIG. 5 is a circuit configuration diagram of the emergency device 110 according to the fifth embodiment. An auxiliary winding N3, a diode D10, and a capacitor C10 are provided to provide a control power source for the AC-DC conversion circuit control unit 3. An auxiliary winding N4, a diode D11, and a capacitor C11 are provided to provide a control power source for the lighting circuit control unit 5.

The transformer T1 constituting the flyback converter includes a primary winding N1 connected to the input side of the AC-DC conversion circuit 2 and a secondary winding N2 connected to the storage battery BT side. The auxiliary windings N3 and N4 described above are both wound around the same iron core as the primary winding N1 and the secondary winding N2 of the transformer T1, and are magnetically connected to the primary winding N1 and the secondary winding N2. Is bound to. The auxiliary windings N3 and N4 are both set to have a larger number of turns than the secondary winding N2.

Next, the operation of the emergency device 110 according to the fifth embodiment will be described. Here, it is assumed that the voltage when the storage battery BT is fully charged is lower than the operating voltage of the AC-DC conversion circuit control unit 3 and the lighting circuit control unit 5. When the AC power supply 1 is applied to the emergency device 110, the control power supply is supplied from the DC output of the rectifier circuit DB to the AC-DC conversion circuit control unit 3 via the start resistor R10, and the switching element SW1 starts the on / off operation. Then, the AC-DC conversion circuit 2 operates. At this time, since the short-circuit switch element SW2 is in the off state, a voltage is applied to the resistance element R2 and a high voltage is induced in the secondary winding N2 even when the storage battery BT is in an uncharged low voltage state. ..

At the same time, a voltage is also induced in the auxiliary windings N3 and N4. The voltage induced in the auxiliary winding N3 is rectified and smoothed by the diode D10 and the capacitor C10, and then supplied to the AC-DC conversion circuit control unit 3 as a control power source. As a result, the AC-DC conversion circuit 2 continues to operate. The AC-DC conversion circuit control unit 3 monitors the current detection signal of the current detection resistor R4, adjusts the on-time of the switching element SW1 so as to obtain a desired charging current, and starts charging the storage battery BT. Further, a control power supply is supplied to the lighting circuit control unit 5 from the auxiliary winding N4, and the lighting circuit control unit 5 is activated. While the AC power supply 1 is turned on, the lighting circuit control unit 5 keeps the operation of the current supply circuit in the stopped state, and the emergency equipment 10 is turned off.

When a predetermined time has elapsed since the lighting circuit control unit 5 started charging the storage battery BT, the voltage of the storage battery BT rises, and reaches a reference voltage predetermined by a program or the like, the storage battery voltage detection resistor R3 The lighting circuit control unit 5 detects this. Then, the lighting circuit control unit 5 controls the short-circuit switch element SW2 in the ON state. As a result, the output current of the AC-DC conversion circuit 2 does not flow through the resistance element R2, and the storage battery BT is charged via the short-circuit switch element SW2. As a result, the power loss generated in the resistance element R2 when charging the storage battery can be reduced. At this time, since the auxiliary windings N3 and N4 are both set to be larger than the number of turns of the secondary winding N2, the voltage generated by the secondary winding N2, that is, the voltage higher than the storage battery voltage is the auxiliary winding N3 and N4. Occurs in. Therefore, even if the short-circuit switch element SW2 is turned on, the control power is continuously supplied from the auxiliary windings N3 and N4 to the AC-DC conversion circuit control unit 3 and the lighting circuit control unit 5.

Next, the operation when the AC power supply 1 has a power failure for some reason will be described. When the AC power supply 1 loses power, the lighting circuit control unit 5 detects this by the power supply detection resistor R1 and starts the operation of the current supply circuit 4. When the current supply circuit 4 operates, a current is supplied to the emergency equipment 10 using the storage battery BT as a power source, and the emergency equipment 10 lights up. Since the AC power supply 1 loses power, the AC-DC conversion circuit 2 stops operating. Along with this, the induced voltage of the auxiliary winding N4 also becomes zero. Therefore, the lighting circuit control unit 5 operates by receiving a control power supply from the output of the boost chopper circuit constituting the current supply circuit 4 at a voltage higher than that of the storage battery BT. The switching period from the occurrence of the power failure to the start of operation of the current supply circuit 4 is short, and during this period, the control power is supplied by the energy stored in the capacitor C11.

As described above, in the present embodiment, for example, the power supply to the control unit in the emergency device having a small output for a small indoor space has been described. Low-power emergency equipment has a small number of storage batteries. For example, a standard nickel-metal hydride storage battery has an output voltage of 1.2V, and when two batteries are provided in series, the total output voltage of the storage battery is 2.4V. On the other hand, the operating voltage of a general microcomputer is about 3.3V to 5V. When the resistance element R2 is short-circuited by the short-circuit switch element SW2, the induced voltage of the secondary winding N2 is fixed at the storage battery voltage 2.4V. Therefore, when at least a part of the lighting circuit control unit 5 is composed of a microcomputer, it lights up. The circuit control unit 5 cannot be driven. Similarly, the AC-DC conversion circuit control unit 3 cannot be driven. Therefore, in the present embodiment, by setting the number of turns of the auxiliary windings N3 and N4 to be larger than the number of turns of the secondary winding N2, the induced voltage of the auxiliary winding is increased and the short-circuit switch element SW2 is operated. Regardless, it was decided to provide the voltage required for driving to the control unit.

Embodiment 6.
FIG. 6 is a diagram showing the internal structure of the luminaire 200. The luminaire 200 includes a luminaire housing 20, a power supply connector 21, an emergency device 22, a storage battery 23, and a light source substrate 24. The lighting fixture housing 20 is a housing for mounting an emergency device 22, a storage battery 23, a light source substrate 24, and the like. The power supply connector 21 is a connection portion for receiving power supply from an AC power source such as a commercial power source. The light source substrate 24 is a substrate on which a light source 24a such as an LED or an organic EL and an optical lens 24b are mounted.

As the emergency device 22, the emergency device described in any one of the first to fifth embodiments is adopted. The emergency device 22 receives power from an AC power source via the power supply connector 21 and the wiring 25. The emergency device 22 converts the input electric power into direct current, and supplies the converted electric power to the storage battery 23 via the wiring 26. Further, in the event of a power failure, electric power is supplied from the storage battery 23 to the emergency device 22 via the wiring 26. Then, the emergency device 22 converts the electric power of the storage battery 23 and supplies the current to the light source substrate 24 via the wiring 27. As a result, the light source 24a mounted on the light source substrate 24 is turned on.

This provides a luminaire 200 with the advantages of the emergency equipment described above. According to the lighting fixture 200, since the storage battery is directly charged by the AC-DC conversion circuit 2 by providing any one of the emergency devices described in the first to fifth embodiments, a charging circuit previously provided separately is provided. Is unnecessary, the entire circuit and lighting equipment can be made compact and low cost, and the power consumption when charging the storage battery can be reduced.

1 AC power supply, 2 AC-DC conversion circuit, 3 AC-DC conversion circuit control unit, 4 current supply circuit, 5 lighting circuit control unit, 10 emergency equipment, BT storage battery, R2 resistance element, SW1 switching element, SW2 short-circuit switch Element, R4 current detection resistor, N3, N4 auxiliary winding, 20 lighting equipment housing, 21 power supply connector, 22 emergency equipment, 23 storage battery, 24 light source board, 100, 101, 102, 110 emergency equipment

Claims (12)

An AC-DC conversion circuit that converts AC voltage to DC voltage,
A storage battery that receives charging current from the AC-DC conversion circuit, and
A current supply circuit that uses the storage battery as a power source to supply current to emergency equipment,
It includes a control unit that receives power from the AC-DC conversion circuit and controls the AC-DC conversion circuit and the current supply circuit.
The AC-DC conversion circuit is arranged in series with the rectifier circuit, the DC generation circuit that charges and discharges energy by a switching element and an inductor or a transformer to generate a DC voltage, and the output of the DC generation circuit. It has a resistance element and a short-circuit switch element connected in parallel with the resistance element.
Under the control of the control unit, the storage battery is charged with the short-circuit switch element turned off at least when the AC voltage is applied, and then the storage battery is charged with the short-circuit switch element turned on. Equipment. The emergency device according to claim 1, wherein the control unit controls the on-time of the switching element according to the value of the charging current supplied to the storage battery. The emergency device according to claim 1 or 2, wherein the control unit turns on the short-circuit switch element when the voltage of the storage battery reaches a reference voltage after the start of charging the storage battery. The emergency device according to claim 1 or 2, wherein the control unit turns on the short-circuit switch element when the voltage of the storage battery rises from the time when the AC voltage is applied. The emergency device according to any one of claims 2 to 4, wherein the AC-DC conversion circuit reduces the charging current to the storage battery after the start of charging the storage battery. The emergency device according to claim 5, wherein the AC-DC conversion circuit reduces the charging current to the storage battery when the voltage of the storage battery rises from the time when the AC voltage is applied. It has a current detection resistor that detects the charging current by being connected in series with the storage battery.
The control unit controls the charging current obtained by the current detection resistor to approach a predetermined value.
The emergency device according to any one of claims 1 to 6, wherein the current detection resistor is provided so as to avoid a path through which the storage battery supplies a current to the emergency device. The control unit according to any one of claims 1 to 7, wherein the control unit stops the operation of the switching element before turning on the short-circuit switch element, and restarts the operation of the switching element after turning on the short-circuit switch element. The emergency device according to any one item. The emergency device according to any one of claims 1 to 8, wherein the short-circuit switch element is a normally-off type. The DC generation circuit is a flyback converter.
The transformer constituting the flyback converter includes a primary winding connected to the input side of the AC-DC conversion circuit, a secondary winding connected to the storage battery side, the primary winding, and the secondary winding. It has an auxiliary winding that is magnetically coupled to the winding and has more turns than the secondary winding.
The emergency device according to any one of claims 1 to 9, wherein the control unit operates by receiving electric power from the auxiliary winding. The emergency device according to any one of claims 1 to 10, wherein the emergency device is a light source, a guide light, a speaker, or a flash device. The emergency device according to any one of claims 1 to 11.
A lighting fixture provided with an LED provided as the emergency fixture.

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