JPH07161480A - Luminaire with spared lamp switching function - Google Patents

Abstract

PURPOSE:To obtain a luminaire, of which spare lamp is automatically liquid in place of a lamp whose lifetime is detected. CONSTITUTION:In the case where the illuminance of a lamp 6 is judged less than a certain value by a switching control unit 3 on the basis of the illuminance monitoring signal from an illuminance monitoring unit 2 for monitoring the lamp 6, the end of a lifetime of the lamp 6 is judged, and a switching unit 4 is controlled on the basis of the lamp switching signal. Supply of the power is automatically switched from the lamp 6 to a spare lamp 8, and the spare lamp 8 is automatically lighted in place of the lamp 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spare lamp which, when the life of the lamp is detected, automatically replaces the spare lamp provided in advance with the spare lamp. The present invention relates to a lighting device with a switching function.

[0002]

2. Description of the Related Art In the luminaires that are used daily, the lamp life is about 1000 hours for incandescent bulbs and about 7500 hours for fluorescent lamps. By the way, in general households, incandescent light bulbs are replaced when the filament is cut, and when fluorescent lamps are felt to be "darker", lamp replacement is performed.
Except for ordinary households, the lamp replacement timing is somewhat different. For example, fluorescent lamps tend to have much longer life and are more economical than incandescent lamps in common streets, stairs, and other street lights in apartments and buildings. In most cases, the fluorescent lamp itself will surely reach the end of its life and fall into the blinking state, and it is rare for the administrator to perform regular lamp replacement before falling into the blinking state. is there. In reality, it is often the residents or employees who notice that the fluorescent lamp itself has reached the end of its life, and the fluorescent lamp itself must be replaced only after the resident has contacted the manager. The fact is that is being done.

[0003]

However, even if the residents and the like notice early that the fluorescent lamp has reached the end of its life, the contact with the administrator or the like tends to be delayed, and even if the contact is made early. The replacement of fluorescent lamps tends to be delayed, and in many cases the fluorescent lamps are left alone for several days. In particular, automatic flashing lights such as street lights tend to be left as they are. On the other hand, when the power switch and the luminaire are isolated, it is often not noticed that the life of the fluorescent lamp itself has run out, and while the lighting / extinguishing state is repeated, the ballast etc. As a result of the burden, the life of the device itself is shortened, and in the worst case, there is a risk of ignition due to overheating, which causes other problems.
Aside from this, when the fluorescent lamp is not lit normally, the necessary and sufficient brightness cannot be secured, which is a problem from the viewpoint of crime prevention and disaster prevention. Especially when not present.

An object of the present invention is to always turn on a lamp, and when the life of an originally provided lamp is detected, a spare lamp provided in advance is automatically replaced in place of the lamp. There is a lighting fixture with a spare lamp switching function that can be placed in the lighting state.

[0005]

Means for Solving the Problems The above-mentioned object is to detect an illuminance monitoring section for monitoring the illuminance of a lamp in an existing luminaire, and when the life of the lamp is detected based on a monitoring signal from the illuminance monitoring section. At least a switching control unit that generates a lamp switching signal and a switching unit that switches the supply of power from the lamp side to the auxiliary lamp side in order to keep a preliminary lamp provided in advance based on the lamp switching signal in a lighting state are provided. Can be achieved.

[0006]

According to the illuminance monitoring signal from the illuminance monitoring section that constantly monitors the illuminance of the lamp, the switching control section determines whether or not the illuminance of the lamp is above a certain level. When it is determined that the illuminance is less than a certain value, it is determined that the lamp has reached the end of its life, and the switching unit is controlled based on the lamp switching signal, so that power is supplied from the lamp side to the auxiliary lamp side. It is designed so that it can be switched automatically. When the lamp reaches the end of its life, if the spare lamp is automatically turned on instead of the lamp, not only the function as a lighting fixture is secured, but also the life of the lamp is increased by lighting the spare lamp itself. Therefore, it is possible to replace the lamp with a margin.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS.
FIG. 1 shows a configuration of an example of a lighting fixture with a spare lamp switching function according to the present invention (hereinafter, simply referred to as a lighting fixture).
In this case, in this example, in the lighting fixture 1, the power switch (single-cut or three-way rectangular continuous switch) 10 embedded in a wall or the like isolated to some extent is switched to the on (closed) state. , Power switch 10, wiring cord 1
The commercial power source can be supplied from the outside through the No. 1 unit. The lighting control unit 5 and the fluorescent lamp 6 are also provided in the interior as essential basic constituent elements. In addition to these, as the constituent elements directly related to the present invention,
The illuminance monitoring unit 2, the switching control unit 3, the switching unit (comprising a relay switch, etc.) 4, the power supply unit (configuring to supply DC power to necessary parts) 7, and the auxiliary lamp 8 are provided. There is.

The normal operation of the luminaire 1 will be described. During normal operation, the fluorescent lamp 6 is turned on or off by switching the power switch 10. There is. That is, when the power switch 10 is switched on to turn on the fluorescent lamp 6, the power switch 10, the wiring cord 11,
The commercial power supply is supplied to the lighting control unit (composed of a glow starter, a ballast, etc.) 5 via the switching unit 4, so that the fluorescent lamp 6 is turned on. While the fluorescent lamp 6 is in a lighting state, the illuminance monitoring unit 2 constantly monitors the illuminance of the fluorescent lamp 6 with an optical sensor (for example, the sensor element is configured as cadmium sulfide CdS).
The illuminance monitor signal from the illuminance monitor 2 is also sent to the switching controller 3
The threshold value is constantly compared and judged. When the fluorescent lamp 6 is normal and has not reached the end of its life, the illuminance monitoring signal is above the threshold,
Therefore, the lamp switching signal is not output from the switching control unit 3 to the switching unit 4, and the switching unit 4 is in a switching connection state in which commercial power is supplied to the lighting control unit 5 side.
When the illuminance monitor 2 monitors the illuminance of the fluorescent lamp 6, it is necessary to properly devise the mounting manner of the optical sensor so that ambient light from other than the fluorescent lamp 6 does not enter the optical sensor. Is. This is because when ambient light is incident on the optical sensor, it may be erroneously determined that the fluorescent lamp 6 has not reached the end of its life, even if it has reached the end of its life.

As described above, in normal times, the power switch 10 is switched, so that the fluorescent lamp 6 is turned on / off.
Assuming that the life is reached while is on,
The illuminance monitor 2 obtains the signal level of the illuminance monitor signal as being less than the threshold value. Therefore, by the lamp switching signal from the switching control unit 3 to the switching unit 4, the switching unit 4 is switched to the auxiliary lamp 8 side in the switching connection state, and commercial power is supplied to the auxiliary lamp 8. The spare lamp 8 is newly turned on instead of the fluorescent lamp 6.

As can be seen from the above description, the switching control section 3 has a fluorescent lamp / spare lamp switching control function.
Specifically, the switching control unit 3 includes, for example, a monitoring signal circuit that compares a signal level of an illuminance monitoring signal with a threshold value, a time constant circuit for invalidating the monitoring signal circuit output immediately after the power switch 10 is turned on, and It is composed of a NOR circuit having two inputs of the monitor signal circuit output and the time constant circuit output. In FIG. 2, immediately after the power switch 10 is turned on,
The output states of the above circuits are shown immediately after the fluorescent lamp 6 reaches the end of its life. As can be seen from the figure, even if the fluorescent lamp 6 itself is normal, immediately after the power switch 10 is turned on,
For a few seconds, the illuminance is in an unstable state below the threshold value, and during that time, the monitoring signal circuit causes the fluorescent lamp 6 to operate.
The output as if the battery has reached the end of its life is obtained in the "L" state. Therefore, the monitor signal circuit output cannot be used as it is as the switching control circuit output. The time constant circuit output is for invalidating the monitor signal circuit output for a few seconds immediately after the power switch 10 is turned on. From the time constant circuit, a signal indicating that the power supply has just been turned on is output as an "H" state for a few seconds immediately after the power switch 10 is turned on. At least during this signal state, the supervisory signal circuit output is It has been invalidated. In other words, the output of the supervisory signal circuit is valid while the signal indicating immediately after the power is turned on is not output. Therefore, if the supervisory signal circuit output and the time constant circuit output are obtained as shown in the figure,
When the outputs are logically AND'ed by a NOR circuit (2-input NAND circuit) having two inputs, a lamp switching signal in the "H" level state is obtained as the output.

Although the illuminance of the fluorescent lamp 6 is unstable for a few seconds immediately after the power switch 10 is turned on, after that, the fluorescent lamp 6 continues to be lit while the illuminance is stable.
If the fluorescent lamp 6 reaches the end of its life and its illuminance drops below the threshold value, the output of the monitoring signal circuit is "L".
However, since the time constant circuit output is already in the “L” state at this point, the NOR circuit outputs the lamp switching signal as the “H” state for the first time at this point, and as a result, The spare lamp 8 is newly turned on instead of the lamp 6.

As described above, at the time when the fluorescent lamp 6 reaches the end of its life, the spare lamp 8 is turned on instead of the fluorescent lamp 6. Although it will be ensured, since the lighting of the spare lamp 8 also indicates that the fluorescent lamp 6 has reached the end of its life, it is easy to display the end of life of the fluorescent lamp 6 by, for example, changing the emission color. It can be done to. Even if the emission colors are the same,
If an indication that the currently lit lamp is the spare lamp is properly displayed, no inconvenience will occur. Incidentally, in this example, it is assumed that the lamp and the spare lamp are a fluorescent lamp and an incandescent lamp, respectively, but the lamp may be an incandescent lamp and the spare lamp may be a fluorescent lamp. Is.

[0013]

As described above, according to the first aspect of the present invention, when the life of the originally provided lamp is detected to be lit on a regular basis, instead of the lamp, the lamp is replaced in advance. It is possible to obtain a lighting fixture with a spare lamp switching function in which a provided spare lamp can be automatically turned on.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an example of a lighting fixture with a spare lamp switching function according to the present invention.

FIG. 2 is a diagram for explaining an operation of a switching control unit as a main part thereof.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lighting equipment with a spare lamp switching function, 2 ... Illuminance monitoring part, 3 ... Switching control part, 4 ... Switching part, 5 ... Lighting control part, 6
… Fluorescent lamp, 8… Spare lamp

Claims (1)

[Claims] 1. A lighting fixture in which a spare lamp is provided in the main body of the fixture in advance, and the life of the lamp is detected based on an illuminance monitoring unit for monitoring the illuminance of the lamp and a monitoring signal from the illuminance monitoring unit. In this case, a switching control unit that generates a lamp switching signal, and a switching unit that switches the supply of power from the lamp side to the auxiliary lamp side in order to keep the auxiliary lamp provided beforehand based on the lamp switching signal in a lighting state, A luminaire with a spare lamp switching function, which comprises at least the following.