JPS6037671Y2 - Inspection device for discharge lamp lighting device - Google Patents

Description

[Detailed explanation of the idea] This invention relates to an inspection device for a discharge lamp lighting device.

In order to light the discharge lamps used for emergency lights and guide lights, a high frequency inverter is prepared in addition to the commercial power supply, and when the commercial power supply is healthy, the discharge lamps are lit by the commercial power supply,
When the commercial power supply is healthy, if a fire alarm etc. is activated, the discharge lamp will be blinked by the commercial power supply in response to this, and if there is a power outage of the commercial power supply, the discharge lamp will be turned on by the high frequency inverter. Furthermore, when the commercial power supply is cut off and a fire alarm or the like is activated, the high frequency inverter causes the discharge lamp to blink.

Such lighting devices require thorough inspection of their lighting conditions, but inspection of the four types of lighting modes described above requires four inspection switches corresponding to each mode. You need to operate these in order.

The purpose of this invention is to enable automatic inspection of each lighting mode of a discharge lamp by simply operating a single inspection switch.

An embodiment of this invention will be described with reference to the drawings.

1 is a commercial power supply, 2 is a discharge lamp, 3 is a high frequency inverter, 4
is a signal line.

A predetermined voltage (for example, the voltage of the commercial power supply IA) is always applied to the signal line 4, and when a fire alarm or the like is activated,
In conjunction with this, the applied voltage is reduced.

5 is a ballast used when lighting the discharge lamp 2 with the commercial power supply 1; 6 is a relay that is excited by the commercial power supply 1; 7 and 8 are its contacts; 9 is a relay that is excited by the voltage of the signal line 4; 10 is its contact, 11 is a transformer, 12 is a rectifier, 13 is a counter (binary counter), 14
15 is an oscillator that oscillates a clock pulse CK, and 15 is a battery charged by the output of the rectifier 12, which is normally in a charged state and used as a power source for the high frequency inverter 3.

16 is an inspection switch connected to the reset terminal of counter 13; 17 is a switch element connected between relay 6 and commercial power supply 1; and 18 is connected to the excitation circuit of relay 9 via signal line 4. Both switch elements 17 and 18 are turned on and off by the output of the counter 13, which will be described later.

19 is a switch element for blinking the discharge lamp 2, which may be a clock pulse from the oscillator 14 (or a pulse from a blinking oscillator).

) is turned on and off. The discharge lamp 2 blinks periodically by turning on and off.

Note that the switch elements 17 to 19 may be constituted by semiconductor switches or the like.

Before explaining the operation of the illustrated configuration, the operation of the counter 13 will be explained.

It is assumed that the counter 13 outputs a 4-bit output, and the output of the maximum digit is set to A1 and the lower digits are B, C, and D in order.

Since the check switch 16 is always on, the counter 13 is in a reset state, and the counter 13 does not perform a counting operation even if the oscillator 14 is in an oscillating state.

Therefore, outputs A to D are O.

The counter 13 starts counting from the time the inspection switch 16 is turned off, but as is well known, the output A
The output is inverted every time the counter 13 counts eight clock pulses.

Also, output B is output every time 4 clock pulses are counted.
The output C is inverted every time two clock pulses are counted.

That is, output A has a clock pulse frequency divided by 178, output B has a frequency divided by 174, and output C has a frequency divided by 172.

This invention utilizes the frequency-divided output in this way.

In the illustrated example, outputs B and C are used, and the output B controls the switch element 17 and the output C controls the switch element 18 on and off, respectively.

That is, when each output is 0, each switch element 17.18
is turned on, and when it is 1, it is turned off.

Next, the operation of the illustrated configuration will be explained.

When the inspection switch 16 is turned on as shown in the figure, the outputs B and C of the counter 13 are 0, so the switch elements 17 and 18 are turned on.

When the switch element 17 is turned on, the relay 6 operates to switch the contact 7 to the A contact side to connect the discharge lamp 2 to the commercial power supply 1 side, and also turns off the contact 8 to connect the high frequency inverter 3 to the battery 1 side.
Separate from the 5th side.

When the switch element 18 is turned on, the relay 9 operates to switch the contact 10 to the A contact side and apply the output voltage of the charging device 12 (or the voltage of the battery 15) to the switch element 19, so that the switch element 19 is continuously operated. It is turned on.

As a result of the above, the discharge lamp 2 is lit by the commercial power source 1 (this is called a commercial lighting mode).

). If the voltage of the signal line 4 drops while the commercial power source 1 is healthy, the relay 9 returns to its original state, and the contact 10 returns to the b contact side.

As a result, the switch element 19 is periodically turned on and off by the clock pulse from the oscillator 14.

Therefore, the discharge lamp 2 comes to blink while being turned on by the commercial power source 1 (this is called a commercial blinking mode).

). Next, when the commercial power supply 1 is in a power outage state, the relay 6 is restored, the contact 7 is switched to the b contact side, and the contact 8 is turned on.

If the voltage of the signal line 4 is normal at this time, the relay 9 continues to operate and the contact 10 is on the a contact side.

Therefore, the high frequency inverter 3 operates using the battery 15 as a power source, and the discharge lamp 2 is lit by its high frequency output (this is referred to as a high frequency lighting mode).

). When the commercial power supply 1 is cut off and the voltage of the signal line 4 also drops, the relay 9 returns and the contact 10 returns to the b contact side, so the switch element 19 repeats turning on and off periodically.

Therefore, the discharge lamp 2 comes to blink in a state where it is lit by the output of the high frequency inverter 3 (this is called a high frequency blinking mode).

). The above explanation has been about the four lighting modes of the discharge lamp 2, but in order to inspect these lighting modes, it is sufficient to turn off the inspection switch 16.

By turning off the check switch 16, the counter 13 starts counting the clock pulses CK from the oscillator 14 from this point on.

Since outputs B and C remain 0 until the first two clock pulses are counted, switch element 1
7.18 is in the on state.

Therefore, the discharge lamp 2 is in a commercial lighting mode.

After counting the second clock pulse, the output C becomes l
Therefore, the switch element 18 returns, the relay 9 returns, and the contact 10 switches to the b contact side.

This causes the discharge lamp 2 to enter the commercial lighting mode.

This state continues until four clock pulses CK are counted.

When the fourth clock pulse is counted, the output B becomes 1 and the output C becomes 0, so the switch element 17 is turned off and the switch element 18 is turned off.

As a result, the relay 6 is reset, the contact 7 is returned to the B contact side, the contact 8 is turned off, and the contact 10 is switched to the A contact side.

This causes the discharge lamp 2 to enter a high frequency lighting mode.

This state continues until six clock pulses CK are counted.

When the sixth clock pulse is counted, both outputs B and C become 1, so that the switch element 18 returns together with the switch element 17, and the contact 10 returns to the b contact side.

As a result, the discharge lamp 2 enters the high frequency lighting state.

This state continues until eight clock pulses CK are counted.

Then, when the eighth clock pulse is counted, both outputs B and C become 0, so switch element 17.
18 work together.

At this time, the discharge lamp 2 enters the commercial lighting state. Repeat this below.

FIG. 2 shows a time chart of the above operation.

Although the example shown in the figure uses outputs B and C, it is not limited to this. For example, outputs A and B or outputs C and D may be used, and in short, the outputs of adjacent digits can be used. You can use both.

In other words, of the outputs of the binary counter, the output divided by 1/2" and the output divided by 1/2" may be used.

As described above in detail, this invention has the effect that four lighting modes of a discharge lamp can be automatically and continuously inspected by simply operating one inspection switch.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of this invention, and FIG. 2 is a time chart for explaining the operation. 1...Commercial power supply, 2...Discharge lamp, 3.
Tuning/high frequency inverter, 4...Signal line, 6...
...First relay, 7. Death...Contact point, 9...
...Second relay, 10...Contact, 13.
... Binary counter, 14 ... Oscillator, 15 ... Battery, 16 ... Inspection switch, 17.18, 19 ... Switch element.

Claims (1)

[Claims for Utility Model Registration] A first relay operated by a commercial power source, a discharge lamp, a high frequency inverter using a battery as a power source, and the operation of the first relay connects the discharge lamp to the commercial power source. A contact point, a first switch element for periodically blinking the discharge lamp, an oscillator for oscillating clock pulses, and a binary counter for counting clock pulses from the oscillator. When the voltage applied to the signal line is dropped, the signal line is operated by the voltage of the signal line, and upon its return, the clock pulse is input to the binary counter, and the first switch element is periodically turned on and off. a second relay, an inspection switch connected to the reset terminal of the binary counter and operated to release the reset at the time of inspection, and dividing the clock pulse of the output of the binary counter by 172'; An inspection device for a discharge lamp lighting device, comprising a switch element that resets the first relay and the 1/b relay by an output.