JP2745379B2 - Fluorescent lighting dimming system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention divides a lighting place into a plurality of lighting areas, and for each lighting area, changes in the luminous flux of a fluorescent lamp over time, dirt on lamps and walls, weather, time, and windows. The present invention relates to a fluorescent lamp lighting and dimming system capable of performing dimming by integrating all of the distance, the use purpose of the place, and the like.

[0002]

2. Description of the Related Art As shown in FIG. 2, the luminous flux of a fluorescent lamp decreases by about 20% in about 4000 hours after the start of use, and then decreases by 1%.
It has the characteristic that the service life is further reduced by 10% in 0000 hours, and the power consumption is substantially constant during that time (even though it gradually darkens). In addition, since the reflectors and walls of the lamp are stained by cigarette smoke or the like, the brightness of the room usually drops more than the decrease in the luminous flux of the fluorescent lamp. Therefore, in the design, the initial brightness is set to be much brighter than the final required brightness, taking into account the luminous flux reduction characteristics and other factors.
Normally, no dimming is performed thereafter. For this reason, the fact is that a considerable amount of wasteful power is consumed over a long period of time. In addition, the amount of light coming in from the window changes depending on the weather and time, and the effect of external light also varies depending on the distance from the window in the same room.In addition, the required brightness between the work place and the part where the reception set is set Are different, etc., it is desirable to perform brightness correction taking all these circumstances into consideration comprehensively.
A fluorescent lamp lighting dimming system that performs dimming in consideration of these factors is not known.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks of the conventional apparatus, and to reduce the luminous flux of fluorescent lamps, dirt on lamps and walls, weather, time, and purpose of use. An object of the present invention is to provide a fluorescent lamp lighting dimming system which can perform dimming comprehensively in consideration of the above and can significantly reduce power consumption.

[0004]

In order to solve the above-mentioned object, a fluorescent lamp lighting dimming system according to the present invention comprises a plurality of fluorescent lamps provided for each of a plurality of partitioned lighting areas, One or more high-frequency constant-current power supply devices to which the fluorescent lamps are connected, and an illuminometer provided for each illumination area and mainly provided at a position where only light reflected from an object to be irradiated in the illumination area is incident. A control unit that is provided for each lighting area and changes the current values of all the high-frequency constant current power supply devices in the lighting area at predetermined time intervals in accordance with the output change of the illuminometer in the lighting area; Switching means for changing between a relatively long maintenance mode and a daylight use mode which is much shorter than the maintenance mode, and setting means for inputting and setting a different design illuminance for each lighting area to the control units of all lighting areas. Characterized in that And further characterized in that setting means is operated by wireless remote control.

[0005]

The lighting location is divided into a plurality of lighting areas, the design illuminance is determined for each lighting area in consideration of the application and other circumstances, and this is input and set in advance to the control unit of each lighting area. At a predetermined time interval, the control unit reads the output change of the illuminometer and changes the output current values of all high-frequency constant current power supply devices in the illumination area according to the change in the value, and the brightness of the illumination area is initially set. The illuminance is corrected to maintain the designed illuminance, so the luminous flux of the fluorescent lamp gradually decreases over a long period of time, the illuminance decreases due to dirt on the reflective surface of the lamp, etc. All changes in illuminance due to the influence of light and the like are integrated and corrected to the original design illuminance for each lighting area.

[0006]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a fluorescent lamp lighting dimming system, and FIG. 2 is a characteristic diagram of the aging of the luminous flux of the fluorescent lamp. A large room is divided into four lighting areas. The four lighting areas are, for example, an area near the east window, an area near the south window, an area near the glass-walled corridor, and a central area away from the window and the corridor. The brightness conditions are completely different, but the brightness is almost uniform in each lighting area.

[0008] Eight inverters 1 are provided for each lighting area, and nine fluorescent lamp lighting fixtures 2 are connected to each inverter 1. The inverter 1 is a high-frequency constant-current power supply device that converts a commercial power supply into a high-frequency current (for example, 65 kHz) and supplies a constant current to the connected fluorescent lamp lighting fixture 2, and a control unit 3 provided for each lighting area.
Thus, the output current value is changed and controlled at predetermined time intervals. Each fluorescent lamp lighting fixture 2 is a combination of two 40 W fluorescent lamps.

A single illuminance meter 4 is provided on the ceiling of each of the four illumination areas substantially at the center thereof, and its output signal is input to the control unit 3 of the illumination area. Illuminometer 4
The case is provided with a shade so that light from the fluorescent lamp lighting device 2 does not directly enter, and a desk in the lighting area,
Only light reflected from an object to be irradiated, such as a floor or a wall, is incident. A sensor 5 for receiving a remote control signal is provided in a case of the illuminometer 4 (although the case may be different), and an output signal thereof is input to a setting means of the control unit 3. The remote control signal frequency is different for each of the four illumination areas, and the portable transmission unit 6 for transmitting the remote control signal includes a channel switching means for specifying the four illumination areas and an up / down button for inputting the design illuminance. .

The control unit 3 of each lighting area includes a transmitting unit 6
When an up signal or a down signal is input via the sensor 5, all the inverters 1 in the lighting area are input.
Is increased or decreased by a predetermined unit, and the last value is stored as the design illuminance. Thereafter, at predetermined time intervals, the output signals of the illuminance meter 4 are detected, and the current values of all the inverters 1 are changed at the same time so that the output signals of the illuminance meter 4 are controlled to match the stored design illuminance. I do.
The control time interval differs between a maintenance mode suitable for a lighting area that is hardly affected by external light and a daylight use mode suitable for a lighting area that is affected by external light. Depending on the time and the degree of influence of external light when daylight use mode is selected, 20
The user selects in advance from three stages of minutes, 30 minutes, and 40 minutes.

Next, the operation will be described. The design illuminance is determined in consideration of the application and other circumstances for each lighting area. First, in the first lighting area, the illuminance meter is held in hand, and the channel switching means of the transmission unit 6 is adjusted to the channel 1, and then the light is increased. By pressing the / down button, the brightness of the illumination changes. If the operation is stopped when the display of the hand illuminometer reaches the design illuminance, the control unit 3 in the first illumination area sets the last value as the design illuminance. Remember. Similarly, the second,
In the third and fourth lighting areas, the design illuminance is input and the setting is completed. Then, after that, the control unit 3 in each lighting area automatically detects the output signal of the illuminance meter 4 at predetermined time intervals and changes the current value of the inverter 1 to keep the brightness of the lighting area at the design illuminance. Control so that When it is necessary to reset the design illuminance due to a change in the use of the illumination area or the like, the same operation may be performed each time to input and set a new design illuminance to the control unit 3 in the illumination area.

FIG. 2 shows the aging of the luminous flux of the fluorescent lamp. If the initial design illuminance is set to the brightness corresponding to the final luminous flux of the fluorescent lamp, the life span of the fluorescent lamp will be long. While the brightness is kept constant, it is possible to save power corresponding to the hatched portion in FIG. The number of sections in the lighting area is not limited to that in the above embodiment, but can be changed as appropriate according to the size of the room and other circumstances. Also, the number of inverters provided for each lighting area and the number of fluorescent lamp lighting devices connected to each inverter can be appropriately changed according to the size of the lighting area, the rating of the inverter, and the like. In the above embodiment, the setting means of the control unit is operated by the wireless remote controller, but it goes without saying that the setting means may be directly operated by hand to input.

The control time intervals in the maintenance mode and the daylight use mode are not limited to those in the above embodiment.
In short, in the maintenance mode, it is only necessary to correct the gradual decrease in the luminous flux of the fluorescent lamp, so it is a relatively long time interval, and in the daylight use mode, it can follow changes in external light with time. That is, the time interval must be very short. The reason why the maintenance mode is provided is that the daylight use mode is greatly affected by disturbance due to its characteristics.For example, the output current of the high-frequency constant current power supply device reacts sensitively just by passing a brightly dressed person near the illuminometer. Values may decrease,
This is to eliminate such unnecessary excessive correction in the daylight use mode from the beginning.

[0013]

As described above, the fluorescent lamp lighting and dimming system according to the present invention can be used to control the luminous flux of a fluorescent lamp over time, dirt on a lamp or a wall for a long time, weather, time, distance from a window, and its location. In addition to being able to create a comfortable light environment with a constant brightness, it is possible to perform optimal dimming for each lighting area divided into multiple areas taking into account all the purpose of use Power consumption can be reduced over a long period of time, especially for a while after the start of use, and it can be significantly reduced by switching to maintenance mode. In an illuminated area where there is no light, it is possible to prevent an excessive useless correction by the daylight use mode. Also,
If the setting means is operated by the wireless remote controller, there is an effect that the operation for inputting the design illuminance is extremely simple.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a fluorescent lamp lighting dimming system according to an embodiment of the present invention.

FIG. 2 is a characteristic diagram showing aging of a luminous flux of a fluorescent lamp.

[Explanation of symbols]

1 Inverter 2 Fluorescent lighting equipment
3 control unit 4 illuminometer 5 sensor
6 Transmission unit

Claims (2)

(57) [Claims] A plurality of fluorescent lamps provided for each of a plurality of partitioned lighting areas, and a plurality of fluorescent lamps in each of the lighting areas connected to each other;
Or two or more high-frequency constant current power supply devices, an illuminometer provided for each lighting area, and provided mainly at a position where only light reflected from an object to be illuminated in the lighting area is provided, and provided for each lighting area. A control unit for changing the current values of all the high-frequency constant current power supply devices in the illumination area at predetermined time intervals in accordance with the output change of the illuminometer in the illumination area; A fluorescent lamp, comprising: switching means for changing to a daylight use mode much shorter than the mode; and setting means for inputting and setting a different design illuminance for each lighting area to the control units of all lighting areas. Lighting dimming system. 2. The fluorescent lamp illumination dimming system according to claim 1, wherein said setting means is operated by a wireless remote controller.