JPH11307278A - Mercury lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust illuminance of a mercury lamp without lighting or putting out the lamp, and to save electric power by providing a light dimming device capable of adjusting illuminance by changing mercury lamp impression voltage, between the mercury lamp and the ballast. SOLUTION: A light dimming device 1 composed of a transformer 4, a switch 5 and a controller 6 is provided between a ballast 8 and mercury 2, Here, the transformer 4 is provided with plural taps 3 of a single winding on the primary side. An output terminal of the ballast 8 and a single tap are connected together in the switch 5 controlled to be opened/closed by the controller 6. The controller 6 has a timer circuit and a CPU programing a procedure to change illuminance by changing impression voltage of a mercury lamp 2 by being switched to a prescribed tap according to the time. Illuminance can be easily obtained when previously finding the relationship between secondary voltage of the transformer 4 and the illumination. Thus, since voltage is changed in the rear stage of the ballast 8, illuminance/light dimming control and electric power consumption-saving can be performed without influencing the mercury lamp lighting action.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mercury lamp for controlling illuminance by changing a voltage applied to the mercury lamp.

[0002]

2. Description of the Related Art Mercury lamps are widely used for lighting gas stations and factories because of their high conversion efficiency of converting electric power to illuminance. (Light) is difficult, and the lighting or dimming operation is performed to control the light to save power. For example, in the case of a gas station, the mercury lamp mainly plays a role as a guide light in the daytime and plays a role mainly as a lighting in the nighttime. For this reason, only the visible mercury lamp is turned on in the daytime, and all lights are turned on in the evening. Also, in a factory or the like, if you want to adjust the illuminance to save power, you will need to turn off or turn on some mercury lamps. It is hardly done because it is troublesome to do.

[0003]

However, in gas stations, there is a growing demand for saving power consumption by changing the illuminance in the evening or rainy day or night without turning off a part of the gas station. And in the factory,
There is a demand for a method of saving power by adjusting the brightness without turning off the mercury lamp.

Accordingly, the present invention has been made to solve the above-mentioned problems, and the invention of claim 1 provides a mercury lamp which can adjust the illuminance without turning off or lighting up and saves power consumption. The subject of the invention, the invention of claim 2 is,
It is an object to make the mercury lamp practicable with a simple configuration.

A third object of the present invention is to make it possible to adjust the illuminance without a troublesome operation, and a fourth object of the present invention is to make the configuration inexpensive.

[0006]

In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a dimming device in which illuminance can be adjusted by changing a voltage applied to a mercury lamp between a mercury lamp and a ballast thereof. Is provided.

According to a second aspect of the present invention, in the first aspect of the present invention, the light control device includes a transformer and a switching device for changing a secondary voltage of the transformer in a plurality of stages.

According to a third aspect of the present invention, in the second aspect of the present invention, the dimming device has a control device that changes the secondary voltage of the transformer by operating the switching device at least according to time. Be composed.

According to a fourth aspect of the present invention, in the third aspect, the voltage switching section of the switching device is formed of a plurality of taps, and the control device changes the secondary voltage of the transformer by switching the taps. It is configured as follows.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a block diagram of a mercury lamp according to the present invention. As shown, the dimmer 1 is provided between a ballast 8 provided on the power supply 7 side and the mercury lamp 2. The dimmer 1 is composed of a transformer 4, a switching device 5, and a control device 6. The transformer 4 is an autotransformer having a plurality of taps 3 on the primary side.
One of the output terminals of the ballast 8 is connected to any one of the taps. The switching device 5 can switch taps by using a switching element such as an electromagnetic switch for each tap. The switching device 5 is controlled to open and close by the control device 6.

The control device 6 has a CPU, is configured to operate according to a programmed procedure, has a timer circuit, and switches to a predetermined tap in accordance with the time so that the application of the mercury lamp 2 is reliably performed each time. The voltage is changed. This makes it possible to easily change the illuminance. Note that the relationship between the secondary voltage of the transformer 4 and the illuminance is
If a correspondence table is created in advance, a desired illuminance can be easily obtained. In the case of tap switching, the control device 6 may control the operation so that the next tap is connected and then the connected tap is disconnected so that the circuit is not disconnected at the moment of switching.

As described above, since the voltage is changed at the subsequent stage of the ballast 8, the illuminance control, that is, the dimming can be performed without affecting the lighting operation of the mercury lamp, and the power consumption can be reduced. Further, since the voltage is changed by the transformer, a simple configuration can be achieved, and dimming can be performed with an inexpensive configuration because the voltage is changed by switching taps.

FIG. 2 shows the switching device 5 and the control device 6 connected to the control panel 1.
0, two mercury lamps 2
Is controlled. The control panel 10 has a time setting button 11a for setting the time of lighting or illuminance,
A timer 11 having a changeover switch 11b for switching between daylight saving time and standard time is provided so that the time can be easily adjusted. The transformer 4 and the ballast 8 are provided separately from the control plate. By providing such a control plate, it is possible to easily change the control and the like.If the transformer is provided independently, the transformer can be provided together with the ballast in place of the conventional ballast. It is also possible to make the installation work of the present apparatus easy.

FIGS. 3A and 3B show an example of a more concrete control panel. FIG. 3A shows a front view of the control panel, and FIG. 3B shows a state in which a mercury lamp is connected to the control panel. In the figure, 12 is a switch, 13 is a sequential control board, 14 is an output board, 15 is a power outlet, and a control device is provided in the sequential control board 13. One output board 14 has two lights or 4 or the like. Is formed so that a mercury lamp of
A total of six sheets are provided. In addition, the dotted line part indicates the output substrate
It has become an expansion space. In addition, power outlet 15
Is provided as a power supply unit when a program is input to the control device by a personal computer or the like. (B) shows a state where two mercury lamps are connected to the output substrate 14. By providing the control plate in this way, it is possible to easily cope with an increase in the number of mercury lamps or a change in the program.

In the above embodiment, the illuminance is controlled to be changed according to the time. However, an illuminometer may be provided to control the light in accordance with the brightness of natural light. Further, a compound winding transformer may be used as the transformer.
A switch having a switching tap on the next side may be used. In a factory, dimming may be performed by manually switching taps without providing a control device, and power can be saved without turning off the light.

[0016]

As described above in detail, according to the first aspect of the present invention, since the voltage is changed in the latter stage of the ballast, the illuminance can be adjusted without affecting the operation of the mercury lamp and consumption can be achieved. Power can be saved.

According to the second aspect of the present invention, since the secondary voltage is changed using the transformer, a simple configuration can be achieved.

According to the third aspect of the present invention, since the voltage applied to the mercury lamp is changed in accordance with the time, there is no need to perform an adjusting operation each time, and a reliable power saving effect can be obtained.

According to the invention of claim 4, since the voltage is changed by switching the tap, the illuminance can be adjusted with an inexpensive configuration.

[Brief description of the drawings]

FIG. 1 is a block diagram of a mercury lamp of the present invention.

FIG. 2 is a diagram showing a state where the control circuit of FIG. 1 is assembled to a control board.

3A and 3B show another embodiment of the control panel, wherein FIG. 3A is a front view of the control panel, and FIG. 3B is a view to which a mercury lamp is connected.

[Explanation of symbols]

1. dimming device, 2. mercury lamp, 3. tap, 4
..Transformers, 5 ... Switching devices, 6 ... Control devices, 7 ...
stabilizer.

Claims (4)

[Claims] 1. A mercury lamp provided with a dimmer between a mercury lamp and a ballast thereof, the dimming device being capable of adjusting illuminance by changing a voltage applied to the mercury lamp. 2. The mercury lamp according to claim 1, wherein the dimmer has a transformer and a switching device for changing a secondary voltage of the transformer in a plurality of stages. 3. The mercury lamp according to claim 2, wherein the dimmer has a control device that changes the secondary voltage of the transformer by operating the switching device at least according to time. 4. The mercury lamp according to claim 3, wherein the voltage switching section of the switching device is formed by a plurality of taps, and the control device changes the secondary voltage of the transformer by switching the taps.