JP2014229467A - Illuminating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a switching operation between regular-use lighting and emergency lighting with safety.SOLUTION: An illuminating device 10 comprises a light source 12, a DC generation circuit 13, a light source lighting circuit 14, an emergency power source circuit 16, an emergency lighting circuit 17, and contacts 51 and 52. At a normal time, the DC generation circuit 13 generates a predetermined DC voltage from a commercial AC power supply 11, and the light source lighting circuit 14 supplies a predetermined DC current to the light source 12 from an output of the DC generation circuit 13. At this time, the A sides of the contacts 51 and 52 are connected with each other, and a power is supplied from a capacitor 45 of the light source lighting circuit 14 to the light source 12 via a capacitor 46. At an emergency, the emergency power source circuit 16 generates a predetermined DC voltage, and the emergency lighting circuit 17 supplies a predetermined DC current to the light source 12 from an output of the emergency power source circuit 16. At this time, the B sides of the contacts 51 and 52 are connected with each other, and a power is supplied from a capacitor 75 of the emergency lighting circuit 17 to the light source 12 via a capacitor 76.

Description

  The present invention relates to a lighting device. The present invention relates to an emergency lighting device, for example.

  2. Description of the Related Art Conventionally, there is a technique for lighting an LED supplied with power from a commercial AC power source using a battery when a power failure occurs (see, for example, Patent Document 1).

JP 2009-158214 A

  The emergency lighting system described in Patent Document 1 includes a power supply device connected to an AC power supply composed of a commercial power supply, a light emitting diode as a light source that is turned on by power supply from the power supply device, and a secondary battery that is charged in a normal time. The battery and switching means for switching the power supply source to the light emitting diode from the power supply device to the secondary battery when the power supply from the power supply device is stopped. The power supply device detects the state of the AC power supply by detecting the state of the AC power supply, the power supply circuit that converts the output of the AC power supply into a predetermined DC voltage, the constant current circuit that outputs the output voltage of the power supply circuit and outputs a constant DC current And a power failure detection circuit that controls the switch element connected to the output of the constant current circuit to be turned on in a state (hereinafter referred to as normal time) and to be turned off in a power failure state (hereinafter referred to as emergency time).

  In the emergency lighting system described in Patent Document 1, a current is supplied from the constant current circuit of the power supply device to the LED in a normal state, and a switch element is switched during a power failure to supply a current from the battery to the LED. However, when supplying current to the LED from the constant current circuit, the commercial AC power supply is turned off with a check switch or the like to switch to power supply from the battery, and the commercial AC power supply is quickly restored by operating the check switch. When this is done, there is a problem that a voltage higher than normal stored at the output terminal of the constant current circuit is suddenly applied to the LED, and an excessive current flows through the LED.

  As described above, in the conventional device, when a device having a constant current characteristic is used as a device for lighting the normal and emergency LEDs, the output of the device on the side from which the LED as a load is disconnected at the time of switching between the normal time and the emergency time. There has been a problem that an excessive current may flow through the LED when the voltage rises and is held, and the LED is reconnected.

  For example, an object of the present invention is to safely perform switching operation between normal lighting and emergency lighting.

A lighting device according to one embodiment of the present invention includes:
A light source;
A normal power generation unit that generates power to be supplied to the light source from power supplied by an external normal power source;
An emergency power source that stores a portion of the power supplied by the utility power source;
A power failure detection unit for detecting a power failure of the common power source;
When a power failure of the utility power source is detected by the power failure detection unit, an emergency power generation unit that generates power to be supplied to the light source from the power stored in the emergency power source,
A current flows from the emergency power generation unit to the normal power generation unit using at least one of a switching element that branches and switches a current flow path and a rectifying element that restricts a current flow direction in one direction. And a current blocking unit that blocks current from flowing from the normal power generation unit to the emergency power generation unit.

  According to one aspect of the present invention, the current blocking unit of the lighting device prevents a current from flowing from the emergency power generating unit to the normal power generating unit, and the current from the normal power generating unit to the emergency power generating unit. Therefore, it is possible to safely perform switching operation between normal lighting and emergency lighting.

FIG. 3 is a circuit diagram illustrating a configuration of the lighting apparatus according to Embodiment 1; FIG. 6 is a circuit diagram illustrating a configuration of a lighting device according to Embodiment 2. FIG. 6 is a circuit diagram illustrating a configuration of a lighting device according to Embodiment 3. FIG. 6 is a circuit diagram illustrating a configuration of a lighting device according to Embodiment 4; FIG. 6 is a circuit diagram illustrating a configuration of a lighting device according to Embodiment 5. FIG. 9 is a circuit diagram illustrating a configuration of a lighting device according to Embodiment 6. FIG. 10 is a circuit diagram illustrating a configuration of a lighting device according to Embodiment 7. FIG. 3 is a timing chart showing the operation of the lighting apparatus according to Embodiment 1;

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

Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration of lighting apparatus 10 according to the present embodiment.

  In FIG. 1, the lighting device 10 is connected to a commercial AC power supply 11. The commercial AC power supply 11 is an example of an external regular power supply. Note that the lighting device 10 may be connected to another type of AC power source or a DC power source instead of the commercial AC power source 11. In the case of a DC power supply, a rectifier circuit 31 and a capacitor 32 of the DC generation circuit 13 described later are not necessary.

  The lighting device 10 includes a light source 12, a DC generation circuit 13, a light source lighting circuit 14, an emergency power supply circuit 16, an emergency lighting circuit 17, and contacts 51 and 52.

  The light source 12 is composed of a series circuit of a plurality of LEDs. The light source 12 may be constituted by a single LED, or may be constituted by a single or a plurality of organic EL or other solid light sources.

  The DC generation circuit 13 generates a predetermined DC voltage from the commercial AC power supply 11 when electric power is supplied from the commercial AC power supply 11 (that is, at normal time). The direct current generation circuit 13 includes a rectifier circuit 31 (for example, a diode bridge), capacitors 32 and 33, a coil 34, a diode 35, a switching element 36 (for example, a MOSFET), and a control circuit 37. The rectifier circuit 31 converts AC power supplied from the commercial AC power supply 11 into pulsating power and supplies it to the capacitor 32. The capacitor 32 smoothes the pulsating power supplied by the rectifier circuit 31 and outputs DC power. The coil 34, the diode 35, the switching element 36, and the control circuit 37 constitute a boost converter. This boost converter outputs DC power having a voltage higher than the input voltage from the capacitor 33 by inputting and boosting DC power output from the capacitor 32.

  The light source lighting circuit 14 supplies a predetermined direct current from the output of the direct current generation circuit 13 to the light source 12 at normal times. The light source lighting circuit 14 includes a switching element 41 (for example, MOSFET), a control circuit 42, a coil 43, a diode 44, and capacitors 45 and 46. The switching element 41, the control circuit 42, the coil 43, the diode 44, and the capacitor 45 constitute a buck converter. The buck converter outputs DC power having a voltage lower than the input voltage from the capacitor 45 by inputting and stepping down DC power output from the DC generation circuit 13. The capacitor 46 has a smaller capacity than the capacitor 45 and is charged by the DC power output from the capacitor 45 to supply the DC power to the light source 12.

  The buck converter (in particular, the capacitor 45) of the light source lighting circuit 14 is an example of a regular power generation unit. The normal power generator generates power to be supplied to the light source 12 from power supplied from an external normal power supply (commercial AC power supply 11).

  The capacitor 45 included in the back converter of the light source lighting circuit 14 is an example of a regular primary capacitor. The regular primary capacitor is a capacitor that generates DC power as power supplied to the light source 12. The capacitor 46 of the light source lighting circuit 14 is an example of a regular secondary capacitor. The regular secondary capacitor is a capacitor having a larger capacity than the regular primary capacitor (capacitor 45).

  The emergency power supply circuit 16 generates a predetermined DC voltage when the commercial AC power supply 11 is interrupted or the power is cut off by an inspection switch (not shown) (that is, in an emergency). The emergency power supply circuit 16 includes a power failure switching circuit 61, a charging circuit 62, a battery 63, a switching element 64, a control circuit 65, a transformer 66, a diode 67, and a capacitor 68. The power failure switching circuit 61 activates the control circuit 65 by detecting a power failure of the commercial AC power source 11 or a power failure caused by an inspection switch. The power failure switching circuit 61 may be configured with an IC that detects the power failure of the commercial AC power supply 11 by monitoring the voltage, output waveform, and the like of the commercial AC power supply 11, or a relay that is operated by the commercial AC power supply 11. The contact point (see FIG. 7). The charging circuit 62 charges the battery 63 using means such as an insulating transformer. The battery 63 outputs DC power while the control circuit 65 is in operation. The switching element 64, the control circuit 65, the transformer 66, the diode 67, and the capacitor 68 constitute a flyback converter. The flyback converter outputs DC power having a voltage higher than the input voltage from the capacitor 68 by inputting and boosting DC power output from the battery 63.

  The power failure switching circuit 61 of the emergency power supply circuit 16 is an example of a power failure detection unit. The power failure detection unit detects a power failure of the regular power supply (commercial AC power supply 11).

  The battery 63 of the emergency power supply circuit 16 is an example of an emergency power supply. The emergency power supply stores a part of the power supplied from the regular power supply (commercial AC power supply 11).

  The emergency lighting circuit 17 supplies a predetermined direct current to the light source 12 from the output of the emergency power supply circuit 16 in an emergency. The emergency lighting circuit 17 includes a switching element 71, a control circuit 72, a coil 73, a diode 74, and capacitors 75 and 76. The switching element 71, control circuit 72, coil 73, diode 74, and capacitor 75 constitute a buck converter. The buck converter outputs DC power having a voltage lower than the input voltage from the capacitor 75 by inputting and stepping down DC power output from the emergency power supply circuit 16. The capacitor 76 has a smaller capacity than the capacitor 75 and is charged by the DC power output from the capacitor 75 to supply DC power to the light source 12.

  The buck converter (in particular, the capacitor 75) of the emergency lighting circuit 17 is an example of an emergency power generation unit. When the power failure detection unit (power failure switching circuit 61) detects a power failure of the utility power supply (commercial AC power supply 11), the emergency power generation unit generates power from the power stored in the emergency power source (battery 63) to the light source 12. Generate power to be supplied.

  The capacitor 75 included in the buck converter of the emergency lighting circuit 17 is an example of an emergency primary capacitor. The emergency primary capacitor is a capacitor that generates DC power as power supplied to the light source 12. The capacitor 76 of the emergency lighting circuit 17 is an example of an emergency secondary capacitor. The emergency secondary capacitor is a capacitor having a larger capacity than the emergency primary capacitor (capacitor 75).

  The contacts 51 and 52 are contacts of a relay (not shown) operated by the commercial AC power supply 11. The capacitor 45 of the light source lighting circuit 14 is directly connected to the capacitor 46 through the contact 51 (the A side) on the low potential side directly on the low potential side. Similarly, the capacitor 75 of the emergency lighting circuit 17 is directly connected to the capacitor 76 via the contact 51 (the B side) on the low potential side directly on the low potential side. Further, the capacitor 46 of the light source lighting circuit 14 is directly connected to the light source 12 through the contact 52 (A side) on the low potential side directly on the high potential side. Similarly, the capacitor 76 of the emergency lighting circuit 17 is directly connected to the light source 12 via the contact 52 (the B side) on the low potential side directly on the high potential side.

  Since the A side of the contacts 51 and 52 is normally connected, power is supplied from the capacitor 45 of the light source lighting circuit 14 to the light source 12 via the capacitor 46, and the light source 12 is turned on. In an emergency, the B side of the contacts 51 and 52 is connected, so that power is supplied from the capacitor 75 of the emergency lighting circuit 17 to the light source 12 via the capacitor 76, and the light source 12 is turned on.

  The contacts 51 and 52 are examples of a switching element that branches and switches a current flow path, and constitutes a current blocking unit of the lighting device 10. The current blocking unit uses two switching elements (contacts 51 and 52) to transfer current from the emergency power generation unit (back converter of the emergency lighting circuit 17) to the normal power generation unit (back converter of the light source lighting circuit 14). Is prevented from flowing, and current is prevented from flowing from the normal power generation unit (back converter of the light source lighting circuit 14) to the emergency power generation unit (back converter of the emergency lighting circuit 17).

  In the present embodiment, one of the two switching elements (contact 51) depends on whether or not a power failure of the common power source (commercial AC power source 11) is detected by the power failure detection unit (power failure switching circuit 61). A state where the common secondary capacitor (capacitor 46) is connected in parallel to the common primary capacitor (capacitor 45) (a state where the A side of the contact 51 is connected), and an emergency secondary capacitor (capacitor 75) The state in which the capacitor (capacitor 76) is connected in parallel (the state in which the B side of the contact 51 is connected) is switched.

  Further, the other one of the two switching elements (contact 52) is regularly used depending on whether or not a power failure of the utility power supply (commercial AC power supply 11) is detected by the power failure detection unit (power failure switching circuit 61). A state where the light source 12 is connected in parallel to the secondary capacitor (capacitor 46) (a state where the A side of the contact 52 is connected) and a state where the light source 12 is connected in parallel to the emergency secondary capacitor (capacitor 76) ( The state where the B side of the contact 52 is connected).

  In an emergency, the normal secondary capacitor (capacitor 46) is disconnected from the normal primary capacitor (capacitor 45) by one of the two switching elements (contact point 51). Therefore, the normal secondary capacitor (capacitor 46) is connected in parallel to the normal primary capacitor (capacitor 45) by the two switching elements (contacts 51 and 52) in a short time from the emergency, and the normal secondary capacitor When the light source 12 is connected in parallel to the (capacitor 46), even if the voltage of the normal primary capacitor (capacitor 45) is increased, no excessive current flows from the normal primary capacitor (capacitor 45) to the light source 12. Therefore, according to the present embodiment, the switching operation between the regular lighting and the emergency lighting can be performed safely.

  In the present embodiment, normally, the contact 51 is connected on the A side, so that the output from the capacitor 45 of the light source lighting circuit 14 is supplied to the capacitor 46 via the contact 51. Further, since the contact 52 is connected on the A side, the light source 12 is lit by a normal output from the capacitor 46 of the light source lighting circuit 14.

  In an emergency, the switching element 64 of the emergency lighting circuit 17 operates, so that DC power from the battery 63 is supplied to the capacitor 68 via the transformer 66. Furthermore, since the switching element 71 of the emergency lighting circuit 17 operates, the capacitor 75 is charged by the output from the capacitor 68. Since the contact 51 is connected on the B side, the output from the capacitor 75 of the emergency lighting circuit 17 is supplied to the capacitor 76 via the contact 51. Further, since the contact 52 is connected on the B side, the light source 12 is lit by the output from the capacitor 76 of the emergency lighting circuit 17 (the same or different output as the normal output described above may be used).

  As described above, in the present embodiment, the control circuit 72 of the emergency lighting circuit 17 operates the switching element 71 so that the direct current of the light source 12 in an emergency also has a predetermined current value. That is, a predetermined output current is supplied to the light source 12 in both the normal time and the emergency time to turn on the light source 12.

  For example, when power supply from the commercial AC power supply 11 is stopped by the inspection switch, the light source lighting circuit 14 having a constant current characteristic is in a state (no load) in which the light source 12 is disconnected by the contacts 51 and 52. If the capacitor 46 is left connected, the terminal voltage of the capacitor 46 rises. Thereafter, when the inspection switch is operated immediately and power supply from the commercial AC power supply 11 is resumed, an excessive current flows from the capacitor 46 whose terminal voltage has increased to the light source 12. However, in the present embodiment, when the light source 12 is disconnected by the contacts 51 and 52, the capacitor 46 is disconnected from the light source lighting circuit 14 and an excessive voltage is not charged in the capacitor 46. Current can be prevented from flowing. As the capacitor 45 of the light source lighting circuit 14, a capacitor having a small capacity that does not damage the light source 12 when the light source 12 is reconnected is selected. The presence of the capacitor 45 is the operation of the buck converter having the capacitor 45 when the output is still generated in the light source lighting circuit 14 at the moment when the switching operation between the normal time and the emergency time is performed by the contacts 51 and 52. Contributes to stability.

Embodiment 2. FIG.
In the present embodiment, differences from the first embodiment will be mainly described.

  FIG. 2 is a block diagram illustrating a configuration of the illumination device 10 according to the present embodiment.

  In FIG. 2, the contact 52 is connected after the contact 51, and the low potential side of the light source lighting circuit 14 that operates normally and the emergency lighting circuit 17 that operates in an emergency are directly connected.

  The capacitor 45 of the light source lighting circuit 14 is directly connected to the capacitor 46 via the contact points 51 and 52 (the A side thereof) on the low potential side directly on the low potential side. Similarly, the capacitor 75 of the emergency lighting circuit 17 is directly connected to the capacitor 76 via the contacts 51 and 52 (the B side) on the low potential side directly on the low potential side. Further, the capacitor 46 of the light source lighting circuit 14 is directly connected to the light source 12 through the contact 52 (A side thereof) at the low potential side directly at the low potential side. Similarly, the capacitor 76 of the emergency lighting circuit 17 is connected to the light source 12 directly on the low potential side and on the high potential side via the contact 52 (B side thereof).

  In the present embodiment, not only one of the two switching elements (contact point 51) but also one of the other switching points (contact point 52) is used by the power failure detection unit (power failure switching circuit 61) as a regular power source (commercial AC power source 11). Depending on whether or not a power outage is detected, a normal secondary capacitor (capacitor 45) is connected in parallel to a normal primary capacitor (capacitor 45) (a state where the A side of the contact 52 is connected), The state is switched between the state where the emergency secondary capacitor (capacitor 76) is connected in parallel to the primary capacitor (capacitor 75) (the state where the B side of the contact 52 is connected).

  In the present embodiment, as in the first embodiment, the other one of the two switching elements (contact 52) is connected to the common power source (commercial AC power source 11) by the power failure detection unit (power failure switching circuit 61). Depending on whether or not a power outage is detected, a state in which the light source 12 is connected in parallel to the normal secondary capacitor (capacitor 46) (a state in which the A side of the contact 52 is connected) and an emergency secondary capacitor ( The state in which the light source 12 is connected in parallel to the capacitor 76) (a state in which the B side of the contact 52 is connected) is switched.

  In an emergency, the normal secondary capacitor (capacitor 46) is disconnected from the normal primary capacitor (capacitor 45) by the two switching elements (contacts 51 and 52). Therefore, as in the first embodiment, the normal time is returned from the emergency in a short time to the normal time, and the normal secondary capacitor (capacitor 46) is connected in parallel with the normal primary capacitor (capacitor 45) by the two switching elements (contacts 51 and 52). When the light source 12 is connected in parallel to the common secondary capacitor (capacitor 46), even if the voltage of the common primary capacitor (capacitor 45) rises, the light source 12 from the common primary capacitor (capacitor 45) Excessive current does not flow through. Therefore, according to the present embodiment, the switching operation between the regular lighting and the emergency lighting can be performed safely as in the first embodiment.

  In this embodiment mode, the switching element is not included in the low potential circuit. Therefore, the reliability of the operation of the device is increased.

Embodiment 3 FIG.
In the present embodiment, differences from the first embodiment will be mainly described.

  FIG. 3 is a block diagram illustrating a configuration of the illumination device 10 according to the present embodiment.

  In FIG. 3, the illumination device 10 does not include the contact 52 unlike the configuration of the first embodiment illustrated in FIG. 1. The lighting device 10 also includes diodes 81 and 82 for preventing simultaneous charging of the capacitors 46 and 76.

  As in the first embodiment, the capacitor 45 of the light source lighting circuit 14 that operates normally is connected to the capacitor 46 directly on the low potential side and to the capacitor 46 via the contact 51 (the A side thereof). Similarly, the capacitor 75 of the emergency lighting circuit 17 is directly connected to the capacitor 76 via the contact 51 (the B side) on the low potential side directly on the low potential side. Unlike the first embodiment, the capacitor 46 of the light source lighting circuit 14 is directly connected to the light source 12 through the diode 81 at the high potential side and directly through the diode 81. Similarly, the capacitor 76 of the emergency lighting circuit 17 is directly connected to the light source 12 via the diode 82 on the high potential side and directly on the low potential side.

  The diode 81 is an example of a rectifying element that prevents current from flowing from the emergency secondary capacitor (capacitor 76) to the regular secondary capacitor (capacitor 46). The diode 82 is an example of a rectifying element that prevents current from flowing from the normal secondary capacitor (capacitor 46) to the emergency secondary capacitor (capacitor 76). The contact 51 and the diodes 81 and 82 constitute a current blocking unit of the lighting device 10. The current blocking unit uses one switching element (contact point 51) and two diodes 81 and 82, from the emergency power generation unit (back converter of the emergency lighting circuit 17) to the normal power generation unit (light source lighting circuit 14). In addition to preventing current from flowing to the back converter), it prevents current from flowing from the normal power generator (back converter of the light source lighting circuit 14) to the emergency power generator (back converter of the emergency lighting circuit 17). To do.

  In the present embodiment, one switching element (contact 51) has a primary primary capacitor depending on whether or not a power failure of the utility power source (commercial AC power source 11) is detected by the power failure detection unit (power failure switching circuit 61). A common secondary capacitor (capacitor 46) is connected in parallel to (capacitor 45) (a state where the A side of contact 51 is connected) and an emergency secondary capacitor (capacitor 75) is connected to an emergency secondary capacitor (capacitor 76). ) Are connected in parallel (a state in which the B side of the contact 51 is connected).

  In an emergency, the switching element (contact point 51) disconnects the regular secondary capacitor (capacitor 46) from the regular primary capacitor (capacitor 45). Therefore, as in the first embodiment, the normal time is returned from the emergency in a short time, and the normal secondary capacitor (capacitor 46) is connected in parallel to the normal primary capacitor (capacitor 45) by the switching element (contact point 51). In this case, even if the voltage of the regular primary capacitor (capacitor 45) is increased, an excessive current does not flow from the regular primary capacitor (capacitor 45) to the light source 12. Therefore, according to the present embodiment, the switching operation between the regular lighting and the emergency lighting can be performed safely as in the first embodiment. When an emergency occurs, the diode 81 prevents the current from flowing from the emergency secondary capacitor (capacitor 76) to the regular secondary capacitor (capacitor 46). It is not necessary to disconnect the light source 12 from the secondary capacitor (capacitor 46).

  In the present embodiment, power is normally supplied from the A side of the contact 51, the output of the light source lighting circuit 14 flows to the light source 12, and the capacitor 46 of the light source lighting circuit 14 is charged. Current is supplied to the light source 12 through the diode 81. At this time, since the diode 82 blocks the capacitor 76 of the emergency lighting circuit 17, no current flows. In an emergency, the power of the emergency lighting circuit 17 is supplied from the B side of the contact 51, and the capacitor 76 of the emergency lighting circuit 17 supplies a current to the light source 12 by the action of the diode 82. In the present embodiment, the capacitors 46 and 76 can be separated by the action of the diodes 81 and 82 even if there is only one contact 51. Further, even when the capacitor 46 of the light source lighting circuit 14 is short-circuited, it is separated by the diode 81, so that the lighting from the emergency lighting circuit 17 can be performed without any trouble.

Embodiment 4 FIG.
In the present embodiment, differences from the first embodiment will be mainly described.

  FIG. 4 is a block diagram showing a configuration of lighting apparatus 10 according to the present embodiment.

  In FIG. 4, the illuminating device 10 is not provided with the emergency lighting circuit 17 and the contact 52 unlike the configuration of the first embodiment shown in FIG. The lighting device 10 also includes diodes 81 and 82 for preventing the capacitors 46 and 69 from being charged simultaneously.

  The light source lighting circuit 14 includes a transformer 47 that insulates the power input side (primary side) and the output side (secondary side) instead of the coil 43 shown in FIG. The switching element 41, the control circuit 42, the diode 44, the capacitor 45, and the transformer 47 constitute a flyback converter. That is, the light source lighting circuit 14 includes a flyback converter instead of a buck converter.

  The flyback converter (in particular, the capacitor 45) of the light source lighting circuit 14 is an example of a regular power generation unit.

  The emergency power supply circuit 16 includes a capacitor 69 in addition to the power failure switching circuit 61, the charging circuit 62, the battery 63, the switching element 64, the control circuit 65, the transformer 66, the diode 67, and the capacitor 68 shown in FIG. . The capacitor 69 has a smaller capacity than the capacitor 68 and is charged by the DC power output from the capacitor 68 to supply the DC power to the light source 12.

  In the present embodiment, the emergency lighting back converter is not used, but the flyback converter of the emergency power supply circuit 16 supplies a preset current to the light source 12.

  The flyback converter (particularly the capacitor 68) of the emergency power supply circuit 16 is an example of an emergency power generation unit. When the power failure detection unit (power failure switching circuit 61) detects a power failure of the utility power supply (commercial AC power supply 11), the emergency power generation unit generates power from the power stored in the emergency power source (battery 63) to the light source 12. Generate power to be supplied.

  The capacitor 68 included in the flyback converter of the emergency power supply circuit 16 is an example of an emergency primary capacitor. The emergency primary capacitor is a capacitor that generates DC power as power supplied to the light source 12. The capacitor 69 of the emergency power supply circuit 16 is an example of an emergency secondary capacitor. The emergency secondary capacitor is a capacitor having a larger capacity than the emergency primary capacitor (capacitor 68).

  The capacitor 45 of the light source lighting circuit 14 that operates normally is connected to the capacitor 46 through the contact 51 (A side) on the low potential side directly on the high potential side. Similarly, the capacitor 68 of the emergency power supply circuit 16 is directly connected to the capacitor 69 via the contact 51 (the B side) on the low potential side directly on the high potential side. The capacitor 46 of the light source lighting circuit 14 is directly connected to the light source 12 via the diode 81 on the low potential side and directly on the high potential side. Similarly, the capacitor 69 of the emergency power supply circuit 16 is directly connected to the light source 12 via the diode 82 on the low potential side and directly on the high potential side. Note that the capacitor 45 of the light source lighting circuit 14 may be connected to the capacitor 46 through the contact 51 (A side) on the high potential side directly, as in the first embodiment. In this case, the capacitor 68 of the emergency power supply circuit 16 is also connected to the capacitor 69 via the contact 51 (the B side) at the low potential side directly and at the high potential side.

  The diode 81 is an example of a rectifying element that prevents a current from flowing from the emergency secondary capacitor (capacitor 69) to the regular secondary capacitor (capacitor 46). The diode 82 is an example of a rectifying element that prevents current from flowing from the normal secondary capacitor (capacitor 46) to the emergency secondary capacitor (capacitor 69). The contact 51 and the diodes 81 and 82 constitute a current blocking unit of the lighting device 10. The current blocking unit uses a single switching element (contact point 51) and two diodes 81 and 82, from an emergency power generation unit (flyback converter of the emergency power supply circuit 16) to a normal power generation unit (light source lighting circuit). 14 is prevented from flowing in the current from the normal power generator (flyback converter of the light source lighting circuit 14) to the emergency power generator (flyback converter of the emergency power supply circuit 16). Stop flowing.

  In the present embodiment, similarly to the third embodiment, whether or not one switching element (contact 51) detects a power failure of the normal power supply (commercial AC power supply 11) by the power failure detection unit (power failure switching circuit 61). Accordingly, a state where the common secondary capacitor (capacitor 46) is connected in parallel to the common primary capacitor (capacitor 45) (a state where the A side of the contact 51 is connected) and an emergency primary capacitor (capacitor 68) are connected. The state is switched between a state where the emergency secondary capacitor (capacitor 69) is connected in parallel (a state where the B side of the contact 51 is connected). Therefore, the same effect as in the third embodiment can be obtained.

  In the present embodiment, the circuits that turn on the light source 12 during normal / emergency are both insulating circuits using transformers 47 and 66. Therefore, the insulating property of the light source 12 is increased. In addition, the configuration of switching using the contacts 51 can be simplified by providing an insulating configuration for at least one of the circuits that light the light source 12 during normal and emergency situations. Further, in the present embodiment, similarly to the third embodiment, even when the capacitor 46 of the light source lighting circuit 14 is short-circuited, the diode 81 is separated, so that the lighting from the emergency power supply circuit 16 can be performed without any trouble.

Embodiment 5 FIG.
In the present embodiment, differences from the fourth embodiment will be mainly described.

  FIG. 5 is a block diagram showing a configuration of lighting apparatus 10 according to the present embodiment.

  In FIG. 5, the illuminating device 10 is not provided with the contact 51 unlike the structure of Embodiment 4 shown in FIG.

  The light source lighting circuit 14 does not include the capacitor 46 shown in FIG.

  The capacitor 45 included in the flyback converter of the light source lighting circuit 14 is an example of a regular capacitor. The regular capacitor is a capacitor that generates DC power as power supplied to the light source 12.

  The emergency power supply circuit 16 does not include the capacitor 69 shown in FIG.

  The capacitor 68 included in the flyback converter of the emergency power supply circuit 16 is an example of an emergency capacitor. The emergency capacitor is a capacitor that generates DC power as power supplied to the light source 12.

  The capacitor 45 of the light source lighting circuit 14 that operates normally is connected to the light source 12 through a diode 81 on the low potential side directly and on the high potential side. Similarly, the capacitor 68 of the emergency power supply circuit 16 is directly connected to the light source 12 through the diode 82 at the low potential side and directly through the diode 82 at the high potential side.

  The diode 81 is an example of a rectifying element that prevents current from flowing from the emergency capacitor (capacitor 68) to the regular capacitor (capacitor 45). The diode 82 is an example of a rectifying element that prevents current from flowing from the normal capacitor (capacitor 45) to the emergency capacitor (capacitor 68). The diodes 81 and 82 constitute a current blocking unit of the lighting device 10. The current blocking unit uses two diodes 81 and 82 to allow current to flow from the emergency power generation unit (the flyback converter of the emergency power supply circuit 16) to the normal power generation unit (the flyback converter of the light source lighting circuit 14). This prevents the current from flowing from the normal power generation unit (flyback converter of the light source lighting circuit 14) to the emergency power generation unit (flyback converter of the emergency power supply circuit 16).

  In this embodiment, a switching element is not necessary. In order to realize this configuration, insulated transformers 47 and 66 are used on the output side of at least one of the light source lighting circuit 14 and the emergency power supply circuit 16. Therefore, when a power failure operation is performed by an inspection switch (not shown), the light source lighting circuit 14 continues to supply power to the light source 12 as long as the energy supply from the capacitor 33 continues, and the emergency power supply circuit 16 is also connected to the battery. When the power supply from 63 starts, power is supplied to the light source 12. However, since the light source lighting circuit 14 and the emergency power supply circuit 16 are separated by the diodes 81 and 82, the power supply source to the light source 12 is automatically switched. In this embodiment, since the switching element is not used, the light source 12 is always connected to the capacitors 45 and 68, so that the capacitors 46 and 69 shown in FIG. 4 are not necessary. Further, in the present embodiment, similarly to the fourth embodiment, even when the capacitor 45 of the light source lighting circuit 14 is short-circuited, it is separated by the diode 81, so that the emergency power supply circuit 16 can be turned on without any trouble.

Embodiment 6 FIG.
In the present embodiment, differences from the first embodiment will be mainly described.

  FIG. 6 is a block diagram illustrating a configuration of the illumination device 10 according to the present embodiment.

  In FIG. 6, the lighting device 10 includes a power failure detection circuit 18 and a capacitor 83, unlike the configuration of the first embodiment shown in FIG. 1.

  The light source lighting circuit 14 does not include the capacitor 46 shown in FIG.

  Unlike the one shown in FIG. 1, the emergency power supply circuit 16 includes a power failure switching circuit 61 composed of relay contacts.

  The emergency lighting circuit 17 does not include the capacitor 76 shown in FIG.

  The power failure detection circuit 18 is an example of a power failure detection unit. If the power failure detection unit has not detected a power failure of the normal power source (commercial AC power source 11), the power failure detection unit causes the normal power generation unit (back converter of the light source lighting circuit 14) to generate DC power. On the other hand, if the power failure detection unit detects a power failure of the utility power supply (commercial AC power supply 11), the operation of the utility power generation unit (back converter of the light source lighting circuit 14) is stopped and the emergency power generation unit ( DC power is generated in the back converter of the emergency lighting circuit 17.

  The light source 12 is connected to the capacitor 83 in parallel. The capacitor 83 is an example of a shared secondary capacitor. The shared secondary capacitor is a capacitor having a larger capacity than the regular primary capacitor (capacitor 45) and the emergency primary capacitor (capacitor 75).

  In the present embodiment, the two switching elements (contacts 51 and 52) are regularly used depending on whether or not a power failure of the utility power supply (commercial AC power supply 11) is detected by the power failure detection unit (power failure detection circuit 18). A state where the shared secondary capacitor (capacitor 83) is connected in parallel to the primary capacitor (capacitor 45) and a state where the shared secondary capacitor (capacitor 83) is connected in parallel to the emergency primary capacitor (capacitor 75). Switch.

  In the present embodiment, when the power failure detection circuit 18 detects a power failure at a check switch (not shown), the light source lighting circuit 14 is promptly connected even if charges are accumulated in the capacitor 33 of the DC generation circuit 13. The operation of the switching element 41 is stopped. Thereby, the output from the light source lighting circuit 14 can be stopped quickly at the time of a power failure. The power failure detection circuit 18 can be configured, for example, by determining the voltage of the commercial AC power supply 11 or the like. As described above, the power failure switching circuit 61 of the emergency power supply circuit 16 operates as a relay contact, and starts supplying the battery 63 in an emergency such as a power failure. The capacitor 83 performs an operation for supplying a current to the light source 12 both in a normal time and in an emergency.

  In normal times, a current is supplied to the light source 12 using the shared capacitor 83, and the light source 12 is turned on. In the event of a power failure, the light source 12 is turned on with a predetermined output by the power supply from the emergency power supply circuit 16, but since the capacitor 83 is shared, supply from the capacitor 45 having a small capacity is stopped when switching to a power failure operation. Even then, the current is continuously supplied from the shared capacitor 83 for a short time, and the voltage of the shared capacitor 83 is in a state close to the voltage at which the light source 12 can be turned on. At this time, switching to power supply from the emergency power supply circuit 16 does not take the time required to charge the emergency lighting capacitor (capacitor 68, etc.) in the fifth embodiment, etc., so that emergency lighting starts. Time can be greatly reduced. That is, by using the common capacitor 83, the light source 12 can be turned on promptly in an emergency.

  In the present embodiment, if a transformer insulated at least one of the light source lighting circuit 14 and the emergency lighting circuit 17 is used, the low potential side of both circuits can be directly connected. In this case, the contact 52 is not necessary.

Embodiment 7 FIG.
In the present embodiment, differences from the fifth embodiment will be mainly described.

  FIG. 7 is a block diagram showing a configuration of lighting apparatus 10 according to the present embodiment.

  In FIG. 7, the illuminating device 10 does not include the diodes 81 and 82 unlike the configuration of the fifth embodiment shown in FIG. In addition, the lighting device 10 includes a capacitor 83.

  The flyback converter of the light source lighting circuit 14 has a common capacitor 83 instead of the capacitor 45 shown in FIG. That is, the flyback converter of the light source lighting circuit 14 includes a switching element 41, a control circuit 42, a diode 44, a capacitor 83, and a transformer 47.

  The transformer 47 of the light source lighting circuit 14 is an example of a regular transformer. The diode 44 of the light source lighting circuit 14 is an example of a rectifying element.

  The flyback converter of the emergency power supply circuit 16 has a common capacitor 83 instead of the capacitor 68 shown in FIG. That is, the flyback converter of the emergency power supply circuit 16 includes a switching element 64, a control circuit 65, a transformer 66, a diode 67, and a capacitor 83.

  The transformer 66 of the emergency power supply circuit 16 is an example of an emergency transformer. The diode 67 of the emergency power supply circuit 16 is an example of a rectifying element.

  The light source 12 is connected to the capacitor 83 in parallel.

  In the present embodiment, the diode 44 prevents a current from flowing from the emergency transformer (transformer 66) to the service transformer (transformer 47), and the diode 67 is changed from the service transformer (transformer 47) to the emergency transformer (transformer 66). ) Is prevented from flowing current.

  In the present embodiment, the diodes 44 and 67 fulfill the function of separating the power supply to the capacitor 83 shared with the rectifying function. In normal / emergency situations, a predetermined direct current is supplied to the light source 12 and the light source 12 is turned on. In the present embodiment, a relay contact as a switching means is unnecessary, and arc generation due to a current supplied to the light source 12 in a switching operation when the contact is used can be prevented. Further, since the light source 12 is connected to the shared capacitor 83, the light source lighting circuit 14 is in a no-load state and a high voltage is charged in the output-side capacitor during an inspection operation with an inspection switch (not shown). Can be avoided. Further, since the charge can be expected to remain in the shared capacitor 83 when switching from the regular lighting to the emergency lighting, the time required to start the emergency lighting can be greatly reduced as in the sixth embodiment. Further, the diodes 44 and 67 for rectification of the converter can be used as diodes for separating charging of the common capacitor 83. If the converter is configured as a buck converter, a diode may be inserted on its output side (like the diodes 81 and 82 in FIG. 4).

  As mentioned above, although embodiment of this invention was described, you may implement in combination of 2 or more among these embodiment. Alternatively, one of these embodiments may be partially implemented. Alternatively, two or more of these embodiments may be partially combined. In addition, this invention is not limited to these embodiment, A various change is possible as needed.

  FIG. 8 is a timing chart showing the operation of the illumination device 10 according to the first embodiment.

  In FIG. 8, the commercial AC power supply 11 has a power outage at time T1. The light source lighting circuit 14 normally continues to supply power for a while until time T2 after a power failure with the energy stored in the capacitor 33 of the direct current generation circuit 13 during normal operation. The normal lighting is switched to the emergency lighting at time T3 by the relay contacts 51 and 52 as switching means. Power supply from the emergency power supply circuit 16 starts at time T4. The light source 12 is lit with a large current i1 during normal times and with a smaller current i2 during emergencies.

  In this way, it is ideal to switch between the regular lighting and the emergency lighting. However, if the output of the regular lighting continues for a long time, the contacts 51 and 52 may be switched first. That is, the time T2 may be after the time T3. In that case, an arc may occur at the contacts 51 and 52. For example, if the operation of the light source lighting circuit 14 that is regularly lit is forcibly stopped using the power failure detection circuit 18 as in the sixth embodiment, an arc is not generated or is short even if it occurs. The arc can be extinguished over time.

  In order to shorten the time required to start lighting in an emergency, it is effective to use a common capacitor 83 as in the sixth embodiment. For example, it is also effective to make the capacity of the capacitor 76 used for emergency lighting smaller than the capacity of the capacitor 46 used for normal lighting.

  The DC generation circuit 13 uses a power factor correction circuit using a boost converter, but other configurations may be used as the power factor correction circuit. A high power factor circuit called a partial smoothing circuit or the like having a small-capacitance capacitor at the output terminal of the rectifier circuit can also be used.

  The light source lighting circuit 14 can use a buck converter, a flyback converter, or other configurations.

  The emergency power supply circuit 16 may have a configuration other than the configuration described above as long as the power of the battery 63 is supplied to the light source 12 and can be turned on in an emergency.

  When one or both of the lighting circuits that perform normal lighting / emergency lighting have an insulated output, the switching means (contacts 51 and 52) can be simplified (reduced number). .

  As the light source 12, various things, such as the thing of the straight tube shape which uses LED, and what arrange | positioned LED on the board | substrate so that LED may be suitably used for a lighting fixture, can be used.

  According to the first to fourth embodiments, even if a device having a constant current characteristic is used for the light source lighting circuit 14, the output voltage of the device on the side from which the LED of the light source 12 is disconnected increases due to an inspection operation or the like. In addition to preventing excessive current from flowing to the LED when the battery is held and reconnected, the reliability of the light source lighting circuit 14 can be reliably turned on in an emergency even if the output capacitor of the light source lighting circuit 14 is short-circuited. To do.

  According to the third and fourth embodiments, the use of the separation diodes 81 and 82 further simplifies the apparatus so that only one set of switching means is required.

  According to the fifth embodiment, there is an advantage that there is no need for further switching means.

  According to the sixth embodiment, since the capacitor 83 used on the light source 12 side is also used for both regular and emergency use, the apparatus can be miniaturized.

  The direct current supplied to the light source 12 during normal and emergency may be set as appropriate depending on the light source and lighting equipment used. For example, the output ratio may be 50% of normal during an emergency. Further, the light may be dimmed at normal times. For example, a technique of detecting the current of the light source 12 and comparing it with a preset target current value to control the output of the light source 12 can be used.

  DESCRIPTION OF SYMBOLS 10 Illuminating device, 11 Commercial AC power supply, 12 Light source, 13 DC generation circuit, 14 Light source lighting circuit, 16 Emergency power circuit, 17 Emergency lighting circuit, 18 Power failure detection circuit, 31 Rectifier circuit, 32, 33 Capacitor, 34 Coil , 35 diode, 36 switching element, 37 control circuit, 41 switching element, 42 control circuit, 43 coil, 44 diode, 45, 46 capacitor, 47 transformer, 51 contacts, 61 power failure switching circuit, 62 charging circuit, 63 battery, 64 Switching element, 65 control circuit, 66 transformer, 67 diode, 68, 69 capacitor, 71 switching element, 72 control circuit, 73 coil, 74 diode, 75, 76 capacitor, 81, 82 diode, 83 capacitor.

Claims (7)

A light source;
A normal power generation unit that generates power to be supplied to the light source from power supplied by an external normal power source;
An emergency power source that stores a portion of the power supplied by the utility power source;
A power failure detection unit for detecting a power failure of the common power source;
When a power failure of the utility power source is detected by the power failure detection unit, an emergency power generation unit that generates power to be supplied to the light source from the power stored in the emergency power source,
A current flows from the emergency power generation unit to the normal power generation unit using at least one of a switching element that branches and switches a current flow path and a rectifying element that restricts a current flow direction in one direction. And a current blocking unit for blocking current from flowing from the normal power generation unit to the emergency power generation unit. The common power generator has a common primary capacitor that is a capacitor that generates DC power as power to be supplied to the light source,
The emergency power generation unit has an emergency primary capacitor that is a capacitor that generates DC power as power supplied to the light source,
The lighting device further includes:
A regular secondary capacitor having a larger capacity than the regular primary capacitor;
An emergency secondary capacitor that is a capacitor having a larger capacity than the emergency primary capacitor;
The current blocking unit is configured such that the normal secondary capacitor is connected in parallel to the primary primary capacitor according to whether the power failure is detected by the power failure detection unit, and the emergency primary The lighting device according to claim 1, further comprising a switching element that switches between a state in which the emergency secondary capacitor is connected in parallel to a capacitor.   The current blocking unit further includes a state in which the light source is connected in parallel to the normal secondary capacitor according to whether or not a power failure of the utility power source is detected by the power failure detection unit, and the emergency two The lighting device according to claim 2, further comprising a switching element that switches a state in which the light source is connected in parallel to a secondary capacitor.   The current blocking unit further includes a rectifying element for blocking current from flowing from the emergency secondary capacitor to the regular secondary capacitor, and a current flowing from the regular secondary capacitor to the emergency secondary capacitor. The lighting device according to claim 2, further comprising a rectifying element for blocking. The common power generator has a common capacitor that is a capacitor that generates DC power as power to be supplied to the light source,
The emergency power generation unit has an emergency capacitor that is a capacitor that generates DC power as power supplied to the light source,
At least one of the normal power generation unit and the emergency power generation unit further includes a transformer that insulates the input side and the output side of power,
The current blocking unit includes a rectifying element that prevents current from flowing from the emergency capacitor to the regular capacitor, and a rectifying element that blocks current from flowing from the regular capacitor to the emergency capacitor. The lighting device according to claim 1. The common power generator has a common primary capacitor that is a capacitor that generates DC power as power to be supplied to the light source,
The emergency power generation unit has an emergency primary capacitor that is a capacitor that generates DC power as power supplied to the light source,
The lighting device further includes:
A common secondary capacitor that is a capacitor having a larger capacity than the primary primary capacitor and the primary emergency capacitor, wherein the light source is connected in parallel;
If the power failure detection unit does not detect a power failure of the utility power source, the power generation unit generates DC power, and if it detects a power failure of the utility power source, the emergency power generation unit Generate power,
The current blocking unit includes a state in which the shared secondary capacitor is connected in parallel to the common primary capacitor according to whether or not a power failure of the utility power source is detected by the power failure detection unit, and the emergency primary The lighting device according to claim 1, further comprising a switching element that switches a state in which the shared secondary capacitor is connected in parallel to the capacitor. The common power generator has a common transformer that is a transformer that insulates the input side and the output side of power,
The emergency power generation unit has an emergency transformer that is a transformer that insulates the input side and the output side of power,
The lighting device further includes:
Comprising a capacitor to which the light source is connected in parallel;
The current blocking unit includes a rectifying element that prevents current from flowing from the emergency transformer to the normal transformer, and a rectifying element that blocks current from flowing from the normal transformer to the emergency transformer. The lighting device according to claim 1.

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