JP4942538B2 - Fluorescent lamp fixtures - Google Patents

Description

  The present invention relates to a fluorescent lamp fixture, and in particular, in a two-lamp parallel type fluorescent lamp fixture equipped with an inverter-type ballast, when necessary, only one of the two lamps is turned on by an ON / OFF operation of a power switch. The present invention relates to a device that can save power.

  In offices, stores, factories, etc., it is common to illuminate the entire room by attaching a large number of fluorescent lamps for two lamps to the ceiling. There are two types of fluorescent lamps for two lamps, a parallel type and a series type. However, a series type, which is superior in terms of performance and price, is widely used for lighting equipment. Many parallel types that can easily perform the above are employed (Patent Document 1, Patent Document 2).

  Recently, energy conservation has been screamed, and lighting fixtures are also turned off to save power when bright lighting with two lights is not needed, such as during the daytime, but two series-type lights are used. If one lamp is removed from a fluorescent light fixture, the other lamp will be extinguished.

  Therefore, in place of a normal fluorescent lamp, a two-lamp series fluorescent lamp in which a remaining one lamp is lit using a dummy tube in which a current-carrying means having a small DC resistance component is connected between two opposing connection terminals. Devices have been proposed (Patent Document 3, Patent Document 4, Patent Document 5).

  Further, there has been proposed a fluorescent lamp apparatus that counts the number of ON / OFF operations of the power switch provided on the wall surface, and allows and stops the operation of the bimetallic starter of the fluorescent lamp according to the number of operations (Patent Document). 6).

Japanese Utility Model Publication No. 06-58596 Japanese Utility Model Publication No. 06-58599 Japanese Patent Laid-Open No. 53-45071 Japanese Utility Model Publication No. 56-130296 JP 2000-208238 A JP 2003-142279 A

  However, in the two-lamp in-line type fluorescent lamp apparatus described in Patent Documents 3 to 5, a dummy tube is used. Therefore, when bright illumination is required such as at night, the dummy tube must be replaced with a normal fluorescent lamp. It was complicated.

  On the other hand, in a two-lamp parallel-type fluorescent lamp fixture, even if one fluorescent lamp is removed, the remaining fluorescent lamp is lit as it is, so if one of the fluorescent lamps can be turned off and turned on by a switch operation, etc. The lamp can be turned off to save power, and at night, two lights can be turned on to ensure bright lighting.

  SUMMARY OF THE INVENTION In view of the above, the present invention has an object to provide a dual-lamp fluorescent lamp apparatus that can reliably save power by turning on only one lamp when necessary by operating a power switch. And

  Therefore, the fluorescent lamp fixture according to the present invention is a two-lamp parallel-type fluorescent lamp fixture, connected to a ballast that uses a commercial power supply as a power source, and in parallel to each other in series with respect to the output end of the ballast, Provided in one of the two energization circuits connected to the two energization circuits and turned on by energization, the two energization circuits that are energized with current from the ballast by turning on the power switch, Switching means for connecting / disconnecting one energization circuit, and responding to an ON / OFF operation of the power switch, and when the power switch is turned ON within a predetermined time after the ON / OFF operation of the power switch And a control circuit for controlling the switching means to disconnect the energization circuit.

  One of the features of the present invention is that a switching means is provided in the energization circuit of one of the fluorescent lamps in a two-lamp-type fluorescent lamp fixture, and the switching means is opened and closed by a control circuit corresponding to ON / OFF operation of the power switch. It is in the point.

  This makes it possible to turn off one light and turn on only the remaining light when no bright lighting is required, such as during the daytime, thus saving power and cutting power consumption as a whole. Energy saving can be achieved. In addition, when bright illumination is required such as at night, it is possible to perform illumination with a necessary brightness by turning on two lights.

  If only one fluorescent lamp is lit to save power, the illumination becomes dark. Therefore, it is preferable to provide a reflector behind the fluorescent lamp to increase the illuminance.

  When switching means is turned on / off of the power switch, two lamps may be lit by the first ON operation of the power switch and one lamp may be lit by the next ON operation. When the power switch is turned off and the power switch is turned on next time, the operation of the power switch becomes the second ON operation, one lamp is turned on, and the fluorescent lamp is damaged. There is a risk of giving.

  Therefore, if it is configured so that the operation of the power switch is determined as the second ON operation only when the next power switch is turned on within a certain time after the two lights are turned on and turned off, a certain time after the light is turned off. When the power switch is turned on after the elapse of time, the two lamps are turned on, and the possibility of misunderstanding as described above can be solved.

  The switching means and the control circuit only need to be able to perform the lighting control as described above. That is, a relay contact is adopted as the switching means, and the control circuit keeps the relay contact in a connected state without energizing the relay coil at the first ON operation of the power switch, and the discharge time of the charge / discharge circuit after the power switch is turned off. When the next ON operation of the power switch occurs until the time elapses, the relay coil can be energized to disconnect the relay contact.

  Specifically, the control circuit includes a switch means that turns on and off in response to turning on and off of the power switch, a clock generation circuit that generates a clock signal when the switch means is turned on, and an output signal when the clock signal is input. An inversion D-type flip-flop circuit, a charge / discharge circuit that is charged by applying a circuit voltage, and that keeps the D-type flip-flop circuit in an operating state during the discharge after the switch means is turned off, and a D-type flip-flop circuit And a switching circuit that turns the relay coil on and off according to the output signal.

  The ballast may be a yoke type transformer, but in order to save power, an inverter type ballast that outputs a high-frequency voltage using the DC voltage of the power circuit that uses a commercial power supply as an input is used. Is preferred.

  Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 to 3 show a preferred embodiment of a fluorescent lamp apparatus according to the present invention. In the figure, the power supply circuit 10 includes a power switch 12, and receives the AC voltage of the commercial power supply 11 and outputs a DC voltage. The output voltage of the power supply circuit 10 is input to the inverter type ballast 13 so that a predetermined high frequency voltage is output.

  Two current-carrying circuits 14A and 14B are connected in series and in parallel to each other at the output end of the inverter ballast 13, and choke coils 15A and 15B and fluorescent lamps 16A and 16B are connected to both current-carrying circuits 14A and 14B. Has been. An example of the circuit configuration of the inverter type ballast 13 is shown in FIG.

  Further, a normal cross type relay contact (switching means) 18 is connected to one energizing circuit 14A, and the relay contact 18 is opened / closed (connected / disconnected) by a control circuit 19 that responds to ON / OFF of the power switch 12. It is like that.

  The control circuit 19 is built in the fluorescent lamp fixture and has, for example, a circuit configuration as shown in FIG.

  The control circuit 19 can basically be constituted by a D-type flip-flop circuit (hereinafter, the flip-flop circuit is simply referred to as an FF circuit). A truth table of the operation of the D-type FF circuit is shown in Table 1.

  That is, the control circuit 19 inverts the output signal in response to the input of the clock signal, the switch SW that is turned on / off in response to the ON / OFF of the power switch 12, the clock generation circuit 30 that generates a clock signal when the switch SW is turned on. The D-type FF circuit IC2, the circuit voltage is applied and charged, and after the switch SW is turned off, the charge / discharge circuit 31 that keeps the D-type FF circuit IC2 in an operating state during the discharge, and the output signal of the D-type FF circuit Accordingly, the switching circuit 32 is configured to turn the relay coil ON / OFF.

  When the power switch 12 is turned on for the first time, the switch (switch means) SW is turned on, and the voltage extracted from the connection point between the Zener diode D1 and the diodes D2 and D3 is applied to the base of the transistor Q1. The voltage ratio between the Zener diode D1 and the diodes D2 and D3 is set so that the base voltage of the transistor Q1 becomes the operating voltage + −1.6V. Further, the AC voltage is lowered from 100 V by the capacitor C1, and a voltage of 5.6 V or more is applied to the Zener diode D1.

  First, when the power switch 12 is first turned on, the switch SW is turned on, a voltage is applied to the base of the transistor Q1, the transistor Q1 is turned on, and the clock signal from the collector of the transistor Q1 is the clock terminal of the FF circuit IC2. Given to CK.

  At this time, since the inverting terminal −Q of the FF circuit IC2 is “H” and the data terminal D is “H”, the output terminal Q of the FF circuit IC2 is “L” until the signal of the clock terminal CK falls. Hold that state.

  The clock signal applied to the clock terminal CK of the FF circuit IC2 from the collector of the transistor Q1 can freely set characteristics and time by changing the time constant determined by the resistor R3, the capacitor C4, and the resistor R4.

  When the output terminal Q of the FF circuit IC2 is held in the “L” state, the base voltage of the transistor Q2 is 0, the transistor Q2 does not operate, the relay RY does not operate, and the relay contact 18 remains ON. Yes, both the fluorescent lamps 16A and 16B are lit.

  In the D-type FF circuit IC2, data at the data input D is read into the FF circuit IC2 when the clock signal falls, and is output to the output terminal Q at the next rise of the clock signal. The FF circuit IC2 set terminal (PR) and the reset terminal CL can set and reset the FF circuit IC2 independently of the input of the clock signal by setting the respective input signals to “H”. CL is connected to the ground GND.

  When the switch SW is turned on, the capacitors C2 and C3 are charged. After the switch SW is turned off, the capacitors C2 and C3 are discharged, and the FF circuit IC2 is operated until the discharge becomes a predetermined voltage or less. The state is retained. The discharge time is determined by the capacitors C2 and C3 and the resistors R1 and R2.

  Therefore, when the power switch is turned on again until the discharge of the capacitors C2 and C3 is completed, the clock signal from the collector of the transistor Q1 is applied to the clock terminal CK of the FF circuit IC2, and the output terminal of the FF circuit IC2 Q is “H” and the inverting terminal −Q is “L”, and the state is maintained.

  This time, the base voltage of the transistor Q2 becomes the operating voltage, the transistor Q2 operates, the relay RY is energized, and the relay contact 18 is turned OFF, so that the fluorescent lamp 16A is not lit and only the fluorescent lamp 16B is lit. To do. The power supply of the relay RY uses 5V supplied from the IC1.

  On the other hand, when the power switch is turned off and the switch SW is turned off and the capacitors C2 and C3 are discharged until the voltage is lower than the predetermined voltage, the D-type FF circuit IC2 is initialized and the relay RY becomes inoperative. The relay contact 18 returns to the normal cross state and returns to the state in which the two lamps 16A and 16B can be lit.

  As described above, when the power switch 12 is repeatedly turned ON / OFF, the D-type FF circuit IC2 is also flip-floped, and the relay RY can be controlled and held. be able to.

It is a figure which shows an example of the circuit structure in preferable embodiment of the fluorescent lamp fixture which concerns on this invention. It is a figure which shows an example of the circuit structure of the ballast in the said embodiment. It is a figure which shows one example of the control circuit in the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Power supply circuit 11 Commercial power supply 12 Power switch 13 Inverter type ballast 14A, 14B Current supply circuit 16A, 16B Fluorescent lamp 18 Relay contact (switching means)
19 Control circuit SW switch (switch means)
30 clock generation circuit 31 charge / discharge circuit 32 switching circuit IC2 D-type flip-flop circuit RY relay

Claims (1)

In the two-lamp type fluorescent lamp fixture,
A ballast (13) powered by a commercial power supply (11) ;
Are connected in parallel to each other to and in series with the output end of the ballast (13), the two conducting circuit (14A which current from ballast (13) is energized by the ON operation of the power switch (12), 14B)
Fluorescent lamps (16A, 16B) connected to the two energization circuits (14A, 14B) and turned on by energization;
A normal cross-type relay contact (18) provided on one of the two energization circuits (14A, 14B ) for connecting and disconnecting the one energization circuit (14A) ;
Switch means (SW) that turns ON / OFF in response to ON / OFF of the power switch (12); Clock generation circuit (30) that generates a clock signal when the switch means (SW) is ON; Output by input of clock signal D-type flip-flop circuit (IC2) that inverts the signal from “H” to “L”, “L” to “H”; charged by application of circuit voltage, and discharge after the switch means (SW) is turned off A charge / discharge circuit (31) for maintaining the D-type flip-flop circuit (IC2) in an operating state during a period of time, and a relay coil (in response to an output signal “H” or “L” of the D-type flip-flop circuit (IC2)). RY) and a switching circuit (32) that cuts off the current. When the power switch (12) is first turned on, the D-type flip-flop circuit (IC) ), The relay contact (18) is held in the connected state without energizing the relay coil (RY), and the discharge time of the charge / discharge circuit (31) elapses after the power switch (12) is turned off. Until the next time the power switch (12) is turned on, the D flip-flop circuit (IC2) is inverted so that the relay coil (RY) is energized by the output signal “H”. The D-type flip-flop circuit is disconnected when the discharge time of the charge / discharge circuit (31) elapses after the power supply switch (12) is turned off while the relay contact (18) is disconnected to disconnect the one energization circuit (14A). A control circuit (19 ) for initializing (IC2) ;
A fluorescent lamp apparatus comprising:

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