JPH11185981A - Aging device of fluorescent lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To light a fluorescent lamp stably by using a leakage type transformer to which a high voltage free from kick voltage generation motion can be continuously applied until lighting of the lamp is started as a ballast in a lighting circuit and arranging a proximity conductor in the vicinity of a section between electrodes of the fluorescent lamp. SOLUTION: Contacts 13, 17 and 15, 19 are closed, a voltage of voltage adjustment type alternating current power supply 12, 16 is applied to transformers for preheating 14, 18, and a preheating voltage is applied to filaments 2, 3 to preheat the filaments 2, 3. When a temperature of the filaments 2, 3 reaches a dischargeable temperature due to preheating, a contact 9 for aging lighting is closed, and a voltage of a voltage adjustment type alternating current power supply 11 having a commercial frequency is applied to the primary side of a leakage type transformer 7 so that secondary open voltages are continuously applied to both ends of a fluorescent lamp 1 and the fluorescent lamp 1 starts lighting. A lamp current becomes substantially a secondary short current due to voltage drop of leakage impedance. Moreover, when a proximity conductor is arranged in the vicinity of a section between electrodes, the lamp is lit at a specific voltage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an aging device for a fluorescent lamp.

[0002]

2. Description of the Related Art As an example of an aging device for a fluorescent lamp of 60 W or less, a plurality of aging circuits 20 (for example, 10 to 10) using a choke type ballast 8 as shown in FIG.
20 circuits), and this circuit 20 and the fluorescent lamp 1 are sequentially electrically connected via the electric wires 5, 6 and the like, and the tact time is 1 to 4 seconds ×
Aging is performed by lighting 10 to 20 times.

Here, the choke type ballast 8 is made so that an aging current of about 120 to 150% of the rated current of the lamp flows.

Hereinafter, the aging lighting operation will be described with reference to FIG.

[0005] The contacts 13, 17 and 15, 19 are closed, and the preheating transformers 14, 18 are connected to the voltage-adjustable AC power supplies 12, 1.
A voltage of 6 is applied, and a preheating voltage (for example, 8 to 10 V) is applied to the filaments (= electrodes; hereinafter referred to as electrodes) 2 and 3 to preheat the filaments 2 and 3.

The contacts 9 and 10 are closed, a current is supplied to the choke type ballast 8 by the voltage-regulating AC power supply 11, and the contact 10 is opened when the temperature of the filaments 2 and 3 rises to a dischargeable temperature by preheating. And a high kick voltage (generally 1000 to 150) generated in the choke type ballast 8.
0V) is applied to the fluorescent lamp 1 to perform lighting.

Immediately after lighting, the contacts 13, 17 and 15, 1
9 is released, the filament preheating is stopped, and after a predetermined time,
The contact 9 is opened, the light is turned off, and one lighting operation ends.

[0008] These series of operations are repeated in synchronization with the machine speed of the aging device.

This lighting operation is a cycle of extinguishing → preheating → lighting → extinguishing. In the aging device, by providing a plurality of circuits as described above, this cycle is repeated for one fluorescent lamp by the number of circuits. Complete aging.

[0010]

However, in the above-mentioned prior art, since non-lighting occurs due to wear of the contact for kick generation, frequent maintenance is required, and the kick voltage required for starting lighting varies. In addition, if lighting cannot be started instantaneously due to a single pulse, the lighting tends to be unlit, there is no stability and reliability as a lighting circuit, and there is a problem that the reliability as an aging device is lacking.

The kick voltage is a single pulse voltage generated in the ballast by interrupting the current flowing through the ballast. The voltage V is a current change di / dt at the time of interruption and the inductance L of the ballast coil. Therefore, V = Ldi / dt, and since the cutoff timing is asynchronous with respect to the AC voltage waveform, the current value at the time of cutoff is different and the kick voltage varies.

These problems can be solved by providing a high-voltage continuous pulse generator that does not use a contact point in each circuit to start lighting instead of the kick voltage. However, a complicated pulse generator is required. Becomes

An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide a highly reliable aging device which has a simple circuit configuration, is reliably turned on, and has good maintainability.

[0014]

According to the present invention, there is provided a leakage type transformer capable of continuously applying a high voltage to a ballast of an aging lighting circuit of a fluorescent lamp without starting kick voltage generation until the start of lamp lighting. Is used. In addition, the proximity conductor is disposed near the electrodes of the fluorescent lamp, thereby enabling stable lighting at a lower voltage.

[0015]

FIG. 1 shows an example of a circuit of an aging device according to the present invention.

The present invention is applied to a fluorescent lamp having a power of 60 W or less. In an aging position, a proximity conductor 4 is disposed near the electrodes 2 and 3 of the fluorescent lamp 1, and the fluorescent lamp 1 is connected to an aging circuit 20 and electric wires 5. 6 and the like.

Here, the leakage type transformer 7 used in the aging circuit 20 has a lamp rated current of 120 to 15
The aging current of about 0% is made to flow.

Hereinafter, the aging lighting operation will be described with reference to FIG.

The contacts 13, 17 and 15, 19 are closed, and the preheating transformers 14, 18 are connected to the voltage-regulating AC power supplies 12, 1.
A voltage of 6 is applied, and a preheating voltage is applied to the filaments 2 and 3 to preheat the filaments 2 and 3.

When the temperature of the filaments 2 and 3 reaches a temperature at which the filaments 2 and 3 can be discharged by preheating, the aging lighting contact 9 is closed, and the voltage of the commercial frequency voltage-regulated AC power supply 11 is applied to the primary side of the leakage type transformer 7. , The secondary open-circuit voltage (for example, 550 V) of the leakage type transformer 7 is continuously applied to both ends of the fluorescent lamp 1, and the fluorescent lamp 1 starts lighting.

A current flows with the lighting, and a voltage drop due to the leakage impedance of the leakage type transformer 7 causes
The secondary voltage (= applied voltage to the lamp) is the lamp voltage (approximately 5
0 to about 120 V), and the lamp current (about 120 to 150% of the rated lamp current) substantially matches the secondary short-circuit current.

However, when the fluorescent lamp 1 is not turned on, the above-mentioned voltage drop does not occur and the leakage type transformer 7
The secondary voltage remains open-circuit voltage, and the high voltage necessary for starting the lighting is continuously applied to the fluorescent lamp 1 until the lighting is started.

Immediately after lighting, contacts 13, 17, and 15,
19, the filament preheating is stopped, and after lighting for a predetermined time, the contact 9 is opened, the fluorescent lamp 1 is turned off, and one cycle of aging is completed.

These series of operations are repeated in synchronization with the mechanical speed of the aging device.

In an aging apparatus for a usual fluorescent lamp manufacturing process, a plurality of the above circuits (for example, 10 to 20 circuits) are provided, and lighting is performed for 1 to 4 seconds × 10 to 20 times.

When the proximity conductor was installed, the secondary open-circuit voltage of the leakage type transformer was reliably turned on at 550 V for the FL40 W fluorescent lamp and at 350 V for the FL 10 W.

On the other hand, when the proximity conductor was not provided, the lighting rate of the FL40W at the secondary open voltage was 10%.

Although the embodiment has been described above, the present invention is not limited to the straight tube type, but can be applied to a ring type, a compact type, and the like.

When the lamp gripping mechanism of the aging device is made of metal and serves as a substitute for the proximity conductor, the proximity conductor need not be provided.

[0030]

According to the present invention, since no contact for kick generation is required, there is no non-lighting due to the contact such as wear and the like, and the maintainability can be improved. In addition, since a high voltage for starting lighting without variation by the transformer is continuously applied until the start of lighting of the lamp, the lighting can be performed even when the lighting cannot be started instantaneously, and the stability and reliability of the lighting circuit can be secured.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a configuration of an aging device according to an embodiment of the present invention.

FIG. 2 is a circuit diagram of a conventional aging device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Fluorescent lamp, 2 ... Filament (= electrode), 3 ... Filament (= electrode), 4 ... Proximity conductor, 5 ... Electric wire, 6 ...
Electric wire, 7 ... leakage type transformer, 8 ... choke type ballast, 9, 10, 13, 15, 17, 19 ... contact, 11,
12, 16: voltage-regulated AC power supply, 14: preheating transformer, 18: preheating transformer, 20: aging circuit.

Claims (1)

[Claims] 1. A lighting method using a leakage type transformer in which a secondary open-circuit voltage for lighting and maintaining a fluorescent lamp of 60 W or less at a commercial frequency is 350 V or more and 550 V or less, and a secondary short-circuit current is generally set to a lamp current at the time of aging. The circuit and the lighting circuit are provided independently, and the preheating current can be adjusted.
An aging device for a fluorescent lamp, comprising: an AC filament preheating circuit; and a proximity conductor disposed between electrodes of the fluorescent lamp.