JP6283908B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture having an auxiliary lighting load.

  2. Description of the Related Art Conventionally, lighting fixtures have been proposed that turn on auxiliary lighting loads called guide light devices other than main lighting or afterglow lighting loads (see Patent Documents 1 and 2). Such an auxiliary illumination load is used exclusively for securing a light source in an emergency such as a power failure of a commercial power source or the like.

JP 2011-91053 A JP 2013-80702 A

  By the way, an emergency power source other than a commercial power source such as an electrolytic capacitor is used for lighting the auxiliary lighting load. Since the power capacity of such an emergency power supply is limited, it is desirable to reduce the use of power as much as possible when the auxiliary lighting load is turned on. Increasing the capacity of the electrolytic capacitor is one measure, but problems such as an increase in cost, mounting area, and prolonged full charge time occur.

  An object of the present invention is to devise a lighting method of an auxiliary lighting load in a lighting fixture having an auxiliary lighting load, and to secure power of a power source of the auxiliary lighting load.

  The luminaire of the present invention includes a main lighting load that is lit by an external power source, an auxiliary lighting load that can be lit when the main lighting load is not lit, and power from the external power source when power can be supplied from the external power source. Auxiliary lighting power supply that supplies power to the auxiliary lighting load when power supply from the external power supply is impossible and power supply from the external power supply becomes impossible. And a control unit that enables power supply from the auxiliary illumination power source to the auxiliary illumination load after a predetermined time has elapsed since the moment.

  As one aspect of the lighting fixture of the present invention, for example, the predetermined time is 2 seconds or more and 5 seconds or less.

 According to the present invention, it is possible to turn on the auxiliary illumination load for a longer time and with brighter illuminance when the external power supply is shut off.

(A) is sectional drawing of the lighting fixture which concerns on one Embodiment of this invention, (B) is the bottom view seen from the downward direction Circuit diagram of lighting apparatus of embodiment The circuit diagram which mainly shows the auxiliary lighting circuit of the lighting fixture of embodiment Circuit diagram showing current flow in normal and emergency operating modes of luminaire Chart showing changes in signal when power is cut off The graph which shows the change of direct illumination intensity with respect to the elapsed time after the power-off of the lighting fixture of an Example and the lighting fixture of a comparative example

  Hereinafter, the lighting fixture which concerns on one Embodiment of this invention is demonstrated with reference to drawings. As shown to FIG. 1 (A) and (B), the lighting fixture 200 of embodiment is suitable for attaching to the ceiling surface 211 grade | etc., Which is a to-be-attached part, and mainly illuminating the downward direction.

  The luminaire 200 has an attachment body 221 for attaching to the hook ceiling 212 attached to the ceiling surface 211 in the center, for example, a disk-like appliance body 220. In addition, a nightlight (not shown) is provided in the vicinity of the attachment member 221 in the central portion of the instrument main body 220.

  An annular frame 222, for example, is provided on the outer periphery of the instrument main body 220, and the auxiliary illumination load 60, which is a light-emitting device using, for example, an LED as a light-emitting element, which will be described in detail later, is provided on the frame 222. Is provided.

  An upper unit 230 that is an indirect light source is provided on the upper side of the instrument main body 220 (that is, on the ceiling surface 211 side). Further, a lower unit (not shown) that is a main light source is provided on the lower side of the instrument main body 220 (that is, the illumination direction side).

  The lower unit has a partial arc-shaped board (not shown) obtained by dividing the circular shape of the instrument body 220 into a plurality of parts, and various circuits, loads and the like to be described later are mounted on each board. A translucent panel 250 that receives light emitted from the lower unit and diffuses the light is provided in front of the lower unit. The panel 250 is attached to the frame body 222. The panel 250 has a curved shape curved downward. A sensor opening 241, an operation display lamp opening 242, and a state display lamp opening 243 are provided on the front surface (lower surface) of the frame body 222.

  FIG. 2 shows a circuit diagram of the lighting apparatus 200 of the embodiment. The circuit portion of the lighting fixture 200 includes a power input circuit 140, a main lighting control circuit 150, a main lighting load 160, a power control circuit 170, an auxiliary lighting control circuit 130, and an auxiliary lighting load 60.

  The power input circuit 140 is a circuit that receives power supplied from an external power source such as the commercial power source 10, generates a power supply voltage for driving the entire lighting fixture 200, and supplies power to each unit via the power line 141. The main lighting control circuit 150 is a circuit for controlling the lighting / non-lighting of the main lighting load 160 used in normal lighting, and is a PFC (Power Factor Correction) main circuit 151 and a first step-down chopper circuit 152. And a second step-down chopper circuit 153. The PFC main circuit 151 realizes energy saving by suppressing the peak power by improving the power factor. The first step-down chopper circuit 152 and the second step-down chopper circuit 153 have voltages that are suitable for the white light emitting device (LED) 161a and the light bulb color light emitting device (LED) 161b of the corresponding main illumination load 160, respectively. Is a circuit for stepping down the voltage.

  The power supply control circuit 170 is configured by an IPD (Intelligent Power Device) or the like, and as will be described later, (i) a power supply for the control unit 70 of the auxiliary illumination control circuit 130, and (ii) a power supply for the main illumination control circuit 150. , Etc. The power supply control circuit 170 also includes electrolytic capacitors 171a and 171b that are used in wall switch operations that can switch the illumination state in the main body of the lighting fixture 200 in addition to remote control operations.

  FIG. 3 is a diagram showing the auxiliary lighting control circuit 130 and the auxiliary lighting load 60 shown in FIG. 2 in more detail. In particular, this figure mainly shows a configuration for controlling the auxiliary lighting load 60 that can be turned on when the main lighting load 160 is not lit, unlike the main lighting load 160 used for normal lighting of the lighting fixture 200.

  In normal lighting, the lighting apparatus 200 receives power from the commercial power supply 10 and exhibits a lighting function when the main lighting load 160 driven by the main lighting control circuit 150 is turned on. And when the power supply from the commercial power supply 10 becomes impossible at the time of a power failure etc., the lighting of the main illumination load 160 becomes impossible. In preparation for the occurrence of such an unforeseen situation, the lighting apparatus 200 of the present embodiment includes an auxiliary lighting load 60 and can be illuminated even when an unforeseen situation such as a power failure occurs.

  The auxiliary lighting control circuit 130 of the lighting fixture 200 includes a charging circuit unit 20, an emergency output circuit unit 40, a connector 50, and a control unit (microcomputer) 70.

  The charging circuit unit 20 normally operates, that is, when power can be supplied from an external power source such as the commercial power supply 10 and the power supply input circuit 140, through the action of a diode bridge and a capacitor 11 (not shown). The supply of the rectified power is received, and the power necessary for lighting the auxiliary lighting load 60 is held. The charging circuit unit 20 includes a voltage drop unit 21 including four series resistors, two Zener diodes 22a and 22b, a diode 23, and three electrolytic capacitors 24a, 24b and 24c.

  The electric power supplied from the external power source is subjected to a voltage drop action to an appropriate voltage by the voltage drop unit 21, clamped at the value of the voltage by the Zener diodes 22a and 22b, and placed in a stable state. Since the reverse current is prevented by the diode 23, the electrolytic capacitors 24a, 24b, and 24c are charged and held with the upper portion of the figure as the positive pole side. The electrolytic capacitors 24a, 24b, and 24c serve as auxiliary lighting power sources that supply power to the auxiliary lighting load 60 when power supply from an external power source is impossible. However, the configuration of the auxiliary illumination power source is not limited to such an example of the electrolytic capacitor.

  The emergency output circuit unit 40 connected to the charging circuit unit 20 via the diode 91 includes a first resistor 41, a second resistor 42, a third resistor 43, a fourth resistor 44, and a MOSFET. A second switching element 45 composed of (metal-oxide-semiconductor field-effect transistor), a capacitor 46, a first switching element 47 composed of IGBT (Insulated Gate Bipolar Transistor), and a capacitor 48. Including.

  The two second switching elements 45 and the first switching element 47 take different ON or OFF states according to a drive signal from the control unit 70 described later, and turn on / off the auxiliary lighting load 60. Control. The capacitor 46 and the capacitor 48 are provided for preventing erroneous operation due to noise of the second switching element 45 and the first switching element 47, respectively. The first resistor 41 limits the current of the auxiliary lighting load 60. The second resistor 42, the third resistor 43, and the fourth resistor 44 reduce the voltage of the supplied power by the combination of the respective voltage dividing actions, and near the gate threshold voltage of the second switching element 45. Prepare to the value of The resistance values of the second resistor 42, the third resistor 43, and the fourth resistor 44 are the same as the driving voltage of the auxiliary lighting load 60 (the sum of the driving voltage of the light emitting element 61a and the driving voltage of the light emitting element 61b described later). The switching element 45 is preferably set to a value that can turn on the second switching element 45. This is because, under such a configuration, the auxiliary lighting load 60 can be used for lighting up to the limit of the voltage energy of the supplied power.

  The auxiliary lighting load 60 connected to the emergency output circuit unit 40 via the connector 50 includes two light emitting elements (LEDs) 61a and 61b connected in series. When the auxiliary lighting load 60 is formed of a board different from the board on which the auxiliary lighting control circuit 130 is formed, the connector 50 is required.

  The control unit 70 is configured by a microcomputer. As will be described later, the control unit 70 generates and transmits different drive signals according to the state of the external power source such as the commercial power source 10.

  As shown in FIG. 2, the control unit 70 is always connected to the power supply control circuit 170 via the regulator 71, and the control unit 70 is constantly supplied with power from the power supply control circuit 170 (the above (i) The role of the power supply control circuit 170 in FIG. Therefore, the control unit 70 can detect a remote control operation, a wall switch switching operation, and the like even during standby, such as when the main illumination is turned off in the normal operation mode described later. This will be described later.

  Further, as shown in FIG. 2, the power supply control circuit 170 is connected to the first step-down chopper circuit 152 and the second step-down chopper circuit 153 of the main illumination control circuit 150 via the third switching element 93. , Supplying power (role of the power supply control circuit 170 in (ii) above). Here, the third switching element 93 can be operated by the drive signal of the control unit 70, and the control unit 70 changes the drive signal according to the situation to change the open state and the closed state of the third switching element 93. Switch. By this operation, it is possible to switch the presence / absence of power supply to the first step-down chopper circuit 152 and the second step-down chopper circuit 153. This will be described later.

  Further, as shown in FIGS. 2 and 3, the power supply control circuit 170 includes the diode 91 and the emergency output circuit unit 40 arranged at the subsequent stage of the charging circuit unit 20 via the third switching element 93 and the diode 92. Is connected to the midpoint between. Therefore, the power supply control circuit 170 can supply power to the emergency output circuit unit 40. As described above, the third switching element 93 can be operated by the drive signal of the control unit 70, and the control unit 70 changes the drive signal according to the situation, so that the third switching element 93 is opened and closed. Switch. By this operation, it is possible to switch the presence or absence of power supply to the emergency output circuit unit 40. Using this configuration, the power supply control circuit 170 can be used as a power source for forced lighting of the auxiliary lighting load 60 at the time of inspection of the lighting fixture 200 or the like.

  Next, the operation modes of the lighting apparatus 200 of the present embodiment will be described by dividing into two modes: (1) normal operation mode and (2) emergency operation mode.

(1) Normal operation mode First, the normal operation mode of the lighting apparatus 200 will be described. The normal operation mode is a state in which an unexpected situation such as a power failure has not occurred and power can be supplied from the commercial power supply 10. This is the operation of the lighting apparatus 200.

  In response to the supply of electric power from the commercial power supply 10, the voltage of the electric power is lowered by the voltage drop unit 21, and a predetermined voltage (for example, 20V) is clamped by the two Zener diodes 22a and 22b. The electrolytic capacitors 24a, 24b, and 24c are charged by this clamp voltage. However, since the power supply from the commercial power supply 10 is possible, that is, when the commercial power supply 10 is on, the control unit 70 outputs a high (on) auxiliary illumination drive signal to the first switching element 47. The first switching element 47 is turned on (closed). At this time, the current flow from the charge of the power supply control circuit 170 or the electrolytic capacitors 24a, 24b, and 24c is as shown by the dotted arrow A in FIG. Since the voltage applied to the gate of the second switching element 45 is smaller than the gate threshold voltage, the second switching element 45 is turned off (opened), and the current flow is indicated by the dotted arrow A in FIG. The auxiliary lighting load 60 is not lit.

  In the normal operation mode, there are two types of switching element drive signals output from the control unit 70 to the third switching element 93: High (on) and Low (off). In the present embodiment, when the switching element drive signal is Low, the third switching element 93 is turned on, and the power from the power supply control circuit 170 is supplied to the first step-down chopper circuit 152 and the second step-down chopper circuit 153. The main lighting load 160 is turned on. When the switching element drive signal is High, the third switching element 93 is turned off, and the power from the power supply control circuit 170 is a nightlight circuit or nightlight (LED) prepared separately from the main lighting load 160 as shown in FIG. ) And a small light comes on at midnight. This switching is performed by a remote control operation, a timer, etc. (not shown).

  The third switching element 93 of the present embodiment is turned on when the input signal is a low switching element drive signal, and turned off when the input signal is a high switching element drive signal. In order to cope with such a logical configuration of the third switching element 93, it is conceivable to incorporate an NPN transistor or the like in the control unit 70 and invert the original signal of the control unit 70. However, the logical configuration of the switching element is not particularly limited.

(2) Emergency operation mode Next, the emergency operation mode of the lighting apparatus 200 will be described. The emergency operation mode is a state in which an unexpected situation such as a power failure occurs and power supply from the commercial power supply 10 is not possible. The operation of the lighting apparatus 200 in FIG.

  When power supply from the commercial power supply 10 becomes impossible, that is, when the commercial power supply 10 is turned off, the control unit 70 detects power loss because the power supply from the power supply control circuit 170 is lost via the regulator 71. As described above, the control unit 70 is always connected to the power supply control circuit 170 via the regulator 71, and the control unit 70 is constantly supplied with power from the power supply control circuit 170. The control unit 70 receives a pulse-like signal (INT signal; energization signal) indicating the energization state from the power supply control circuit 170, and while receiving this signal, the control unit 70 Ascertain that such an external power source is secured.

  However, at the time of a power failure or the like, power supply from an external power source such as the commercial power source 10 is cut off, and at this time, the INT signal to the control unit 70 is also turned off. At this time, after a predetermined time (for example, 3 seconds) has elapsed, the control unit 70 outputs a Low auxiliary illumination drive signal to the first switching element 47, and thus the first switching element 47 is turned off (opened). . At this time, a current flows in a dashed-dotted arrow B in FIG. 4 using the electric charges charged in the three electrolytic capacitors 24a, 24b, and 24c as a power source. The voltage applied to the gate of the second switching element 45 generated from the second resistor 42, the third resistor 43, and the fourth resistor 44 is equal to or higher than the gate threshold voltage of the second switching element 45. Thus, the second switching element 45 is turned on (closed). Furthermore, using the electric charges charged in the three electrolytic capacitors 24a, 24b, and 24c as a power source, current flows along the two-dot chain line arrow C in FIG. 4, and the auxiliary lighting load 60 is lit. The power and current supply paths at this time are electrolytic capacitors 24a, 24b, 24c → diode 91 → emergency output circuit 40 → auxiliary lighting load 60.

  In the present embodiment, in the emergency operation mode, the control unit 70 outputs a high switching element drive signal and turns off (opens) the third switching element 93.

  By the way, at the time of transition from the normal operation mode to the emergency operation mode at the time of a power failure or the like, the auxiliary lighting load 60 can be turned on immediately. However, prolonging the lighting time causes a waste of charge of the electrolytic capacitors 24a, 24b, and 24c.

  Further, as described above, the power supply control circuit 170 includes the electrolytic capacitors 171a and 171b that are used in wall switch operations that can switch the illumination state in the main body of the lighting fixture 200 separately from the remote control operation. Here, the switching of the lighting state by the wall switch operation includes not only a simple ON → OFF switching operation of the main lighting load 160 but also a lighting mode switching operation such as ON → OFF → ON. The switching operation of the lighting mode is within a short time (for example, 2 seconds) after the user turns off the power source of the power supply control circuit 170 by performing a wall switch operation of ON → OFF in the lighting state of the main lighting load 160. This is a series of operations for turning on the power source of the power supply control circuit 170 again by performing the wall switch operation from OFF to ON by the user. Even under such a configuration, when the user performs an on-to-off wall switch operation to turn off the power source of the power supply control circuit 170, the control unit 70 determines that a power failure has occurred, and the auxiliary lighting load 60 It is possible to light up immediately. However, even if the auxiliary lighting load 60 is turned on immediately, the brightness does not change so much because the main lighting load 160 is turned on immediately before. Therefore, there are few merits which dare to light the auxiliary illumination load 60 immediately.

  In addition, if the auxiliary lighting load 60 is turned on during the above-described switching operation of the lighting mode, the user may recognize a malfunction because the auxiliary lighting load 60 is turned on at a timing different from the originally intended power outage auxiliary lamp of the auxiliary lighting load 60. There is also.

  Therefore, in the present embodiment, the control unit 70 includes electrolytic capacitors 24a, 24b as auxiliary lighting power sources after a predetermined time has elapsed since the moment when power supply from an external power source such as the commercial power source 10 became impossible. The electric power supply from 24c to the auxiliary illumination load 60 is enabled. Specifically, the lighting of the auxiliary lighting load 60 is started after a predetermined time (such as 3 seconds) has elapsed during a power failure. With such a configuration, the electric charges of the electrolytic capacitors 24a, 24b, and 24c can be preserved as much as possible, and the auxiliary lighting load 60 can be lit for a longer time and with a brighter illuminance.

  As described above, the control unit 70 is always connected to the power supply control circuit 170 via the regulator 71, and the control unit 70 is constantly supplied with power from the power supply control circuit 170. However, in the event of a power failure or the like, power supply from an external power source such as the commercial power supply 10 is cut off, and at this time, a signal (INT signal; energization) indicating power supply to the control unit 70 via the third switching element 93 Signal) is also turned off. The control unit 70 sets the switching element drive signal to Low (off) so that the lighting of the auxiliary illumination load 60 starts after a predetermined time has elapsed since this time. At this time, the lighting of the auxiliary illumination load 60 starts through the above-described operation.

  FIG. 5 is a chart showing the change in the signal described above. When the pulsed INT signal is turned off, that is, after t seconds have elapsed after the power supply (power supply) is shut off, the switching element drive signal Is switched from High (On) to Low (Off). In the present embodiment, after a predetermined signal error determination period has elapsed after the INT signal has been turned off for a predetermined number of pulses, the control unit 70 starts counting t seconds. The signal error determination period is a period for the control unit 70 to confirm that switching of the INT signal to OFF is not caused by noise or the like, but is not an indispensable period.

  FIG. 6 is a graph showing a change in illuminance (lux; Lx) immediately below the lighting fixture with respect to an elapsed time after power-off of the lighting fixture of the example and the lighting fixture of the comparative example. In the lighting fixture of the comparative example, the lighting of the auxiliary lighting load starts immediately after the power is turned off, but in the lighting fixture of the embodiment, the lighting of the auxiliary lighting load starts immediately after the power is turned off and after t seconds (= 3 seconds). ing. It is understood that the decrease in the illuminance directly under the lighting fixture of the example is significantly smaller than the decrease in the illuminance directly under the lighting fixture of the comparative example, and in the lighting fixture of the example, the decrease in the charge of the electrolytic capacitor as a power source is small. .

  The value of t seconds described above is not particularly limited, but is preferably set to 2 seconds or more and 5 seconds or less, more preferably 3 seconds or more and 5 seconds or less.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

20 Charging circuit unit 21 Voltage drop unit 22a, 22b Zener diode 23 Diodes 24a, 24b, 24c Electrolytic capacitor 40 Emergency output circuit unit 41 First resistor 42 Second resistor 43 Third resistor 44 Fourth resistor 45 Second Second switching element 46 Capacitor 47 First switching element 48 Capacitor 50 Connector 60 Auxiliary lighting loads 61a and 61b Light emitting element (LED)
70 Control unit (microcomputer)
91 Diode 92 Diode 93 Third switching element 130 Auxiliary illumination control circuit 140 Power input circuit 150 Main illumination control circuit 160 Main illumination load 170 Power supply control circuit 200 Lighting fixture

Claims (2)

A main lighting load that is lit by an external power source
An auxiliary lighting load that can be turned on when the main lighting load is not lit;
When the power supply from the external power supply is possible, the power supply from the external power supply can be received and charged, and when the power supply from the external power supply is impossible, power is supplied to the auxiliary lighting load. A power source for auxiliary lighting consisting of an electrolytic capacitor of
A control unit that enables power supply from the auxiliary lighting power source to the auxiliary lighting load after a predetermined time has elapsed since the moment when power supply from the external power source became impossible;
Bei to give a,
The control unit starts counting the predetermined time after a predetermined signal error determination period has elapsed after the pulse of the energization signal indicating power supply from the external power supply is turned off.
lighting equipment. The lighting fixture according to claim 1,
The lighting apparatus wherein the predetermined time is 2 seconds or more and 5 seconds or less.

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