JPS6056353A - Starter built-in type high pressure sodium lamp - Google Patents

Abstract

PURPOSE:To enable an accurate start under all operating conditions by parallelly connecting a series circuit consisting of a glow starter, bimetal switch, heating body that heats this bimetal switch, and current limiting resistor to a luminous tube. CONSTITUTION:Electrodes 2 and 3 are provided on both ends of a luminous tube 1 made of transparent ceramics, etc. and sodium amalgam and xenon are sealed in the luminous tube 1. In addition, the series circuit of a heating body 11 consisting of a glow starter 4, bimetal switch 5, resistor 6 that limits the current applied to glow starter, tungusten filament that heats the bimetal switch 5, etc. to the luminous tube 1. Furthermore, a starting auxiliary conductor 7 is attached on the external surface of the luminous tube 1 and a second bimetal switch 8 that disconnects the potential to the starting auxiliary conductor 7 is provided while a lamp is operating.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in a high-pressure thorium lamp with a built-in starter.

Conventional structure and its problems Conventional high-pressure sodium lamps with a built-in starter have a bimetal switch type starter that uses a combination of a bimetal switch and a resistor that heats Jl to open the circuit. , a glow starter is used, and there are k types.

Among these, in the bimetal switch method, the C1 bimetal switch opens in the vacuum outer sphere, so when it opens, the electromagnetic energy is stored in the ballast and is transferred between the contacts of the bimetal switch. Compared to the glow scooter method, a pulse voltage that is essentially higher than that of the glow scooter method can be obtained. Speed 11.2 -〉teshi:.

4 to 5 KV, which is higher than the height required to start the discharge of light emitting r7.
Since a river of pulses can be generated, the point l′
It is necessary to give sufficient consideration to the insulation of each circuit. On the other hand, in the case of the glow starter method, the opening of the contacts of the glow starter is carried out in the rare gas sealed in the glow starter, so a part of the electromagnetic energy of the ballast at the time of opening is transferred between the contacts. The magnitude of the pulse voltage lost due to the discharge of 2 KY cannot exceed a certain value (approximately 2 KY).

That is, in the glow starter system, the magnitude of the maximum pulse voltage H2 can be controlled to some extent by the composition, pressure, etc. of the gas filled in the glow starter. Did you?),
There is no need to pay any attention to the insulation of the firing circuit in the case of the Ba-Imekuru-Sinochi method. For this reason, a glow starter system is often adopted for IJum lamps, which do not require a particularly high pulse voltage to start discharge in the arc tube.

An example of the circuit configuration of such a conventional high-pressure thorium lamp with a built-in glow stark is shown in FIG.

In Fig. 1, 1 is an arc tube with IfJ and NAL-
1) Xenon is sealed at a pressure of 100 to 200 Torr as a starting gas together with the gum. 2 and 3 are electrodes, and 4 is a glow starter.

5 is a bimetal switch, but it is not intended to generate a pulse voltage; it enters a path state due to heat radiated from the arc tube 1 while the lamp is operating.
This serves to cut off the potential to the glow starter. 6 is a resistor for limiting the current flowing to the glow starter 4.

Reference numeral 7 denotes an auxiliary conductor for starting, which is prevented from increasing its potential by a second bimetal switch 8 while the lamp is in operation. 9t: i is an outside ball.

When the ballast 104 is turned on and an AC power supply voltage is applied to the lamp constructed in this way, after 1 to 2 Pν, the arc tube 1's 1st voltage starts to rise within 5 seconds after the application of the power supply type I-E. ．．・
The electricity starts. However, because of this, a large number of JJfi's rape 1'lv・Z 1. I did a start-up experiment around 1977, and found that although the occurrence rate was small, it was possible that a problem similar to that of the conventional lamp Ci1 could occur.
child. After starting the lamp, let it burn for a few seconds and then turn it off] Let it cool down sufficiently before starting the lamp again.
As a result, glow starter 4 was operating normally fl 17
A lamp was found in which the arc tube 1 did not start discharging even when the lamp was turned on. This is thought to be due to the fact that the lamp was turned on for several seconds (A1), which made it difficult for the arc tube 1 to start for the following reasons.

In other words, when the lamp is turned off after reaching a stable state as usual, the sodium amalga J-νMazu 1- which was present in the gaseous state in the arc tube 1 during lighting, is removed from the end of the light tube 1. It condenses behind electrode 2 or 3. When the lamp in these two conditions is started, when the discharge starts, the condensed L7 and 11 um amalgam is scattered behind the electrodes 2 and 3, and the inner wall of the arc tube around the electrodes in the vicinity is scattered. Adheres in a mirror-like manner. During normal lighting, as the temperature of the arc tube 1 rises and the lamp transitions to a stable state, the sodium amalgam adhering to the inner wall of the arc tube around the poles is emitted, and a portion of it is emitted again. It condenses in the coldest part behind the electrode. ,
When the lamp goes out a few seconds after starting, the amalgam deposited in a mirror-like manner on the inner wall of the tube around the electrodes is left behind and broken off. When the lamp is restarted after cooling in such a state, the mirror-like amalgam will move outward from the arc tube 1 (Iiii) and the starting auxiliary conductor 7
This is considered to be one of the reasons why it is difficult to start the light emission v1. Such a lamp will always start if a pulse voltage higher than that of the glow starter is applied from the outside, and thereafter it will operate without any problem under normal operating conditions F'[-.

Such a phenomenon is observed only in a small part of the lamps manufactured using the same production method 1 cow, and the reproducibility of the phenomenon in [1. A phenomenon like this can be put into practical use! It is not necessarily impossible that a power outage occurs at the East Gate facility due to various circumstances, and in that case, the TQL lamp must be replaced by 7 tons.

OBJECTS OF THE INVENTION The present invention has been made in view of the following circumstances.Even if the arc tube becomes difficult to start under the special conditions of use as mentioned above, It is an object of the present invention to provide a high-pressure lamp with a built-in starter that is operable.

Structure of the Invention In order to achieve the above object, the high-pressure sodium rung with built-in starter of the present invention includes a glow starter, a bimetallic switch, a heating element for heating the bimetallic switch, and a resistor for current limiting. A series circuit is connected in parallel with an arc tube and housed inside a vacuum outer sphere.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Figure 2 i71 shows an example of the circuit configuration of the high-pressure nut with built-in starter l) ram lamp according to the present invention.

In the figure, reference numeral 1 denotes an arc tube made of translucent ceramic, and electrodes 2 and 3 are provided at both ends.

Inside the arc tube 1, there are 1 ~ lium amalga 1, and 1
There is 1 cm of quinanone at 00 to 200 Torr. 4 is a glow starter, 5 is a bimetal switch,
6 is a resistor for limiting the current flowing to the glow starter 4. Reference numeral 11 is a heating element for heating the bimetal switch 5, and is made of, for example, a tungsten filament. Reference numeral 7 denotes an auxiliary conductor for starting which is attached to the outer surface of the arc tube 1.

The second bimetal switch 09, which is used to cut off the potential to the starting auxiliary conductor γ during operation of the 8d lamp, is an outer bulb.

When the high voltage IJ module according to the present invention configured as described above is connected to the power supply via the ballast 1Q, normally it will be connected to the power supply via the ballast 1Q.
As in the case of Umranzo, the glow starter 4 starts operating after 1-2%, and the discharge between the electrodes 2 and 3 of the arc tube 1 starts within about 5 seconds. When the discharge of the arc tube 1 starts, the voltage between the terminals of the glow starter 4 decreases to 20 to 40V, so the glow starter 4 stops operating.
When the arc tube 1 reaches a stable state, the bimetal switch 5 is opened due to the radiant heat from the arc tube 1, and the application of the voltage to the glow star 4 is cut off.

Next, as mentioned above, even if the lamp goes out several seconds after starting and the lamp is in a state where it is difficult to start, the discharge of the arc tube 1 will not start with the pulse Ichikawa caused by the operation of the glow starter 4. , glow starter A continues to operate, but
The temperature of the heating element 11 rises due to the current flowing through the glow star 4, and the bimetal switch 6 is opened after 6 to 10 seconds.

At that moment, a pulse voltage of 2 to 3 KV is generated in the ballast 10, and discharge of the arc tubes 1 and 1 begins. Bimetal switch 5
If the discharge of the arc tube 1 does not start due to the first opening of the bimetal switch 5, the bimetal switch 5 may
Seconds later, the circuit is reclosed and the operation from the beginning is repeated, and the arc tube 1
The celebration will begin. Bimetal switch 5
In order to shorten the time for re-closing the circuit after the circuit is opened, it is preferable to make the heat capacity of the bimetal switch 5 and the heating element 11 as small as possible. Preferably, it consists of a tungsten wire filament.

Effects of the Invention As explained above, the present invention is a high-voltage engine with a built-in starter that has an i'r ia configuration in which a heating element is added and has the excellent effect of ensuring reliable starting under any usage conditions. ) It is possible to provide IJum lamps ^

[Brief explanation of drawings]

FIG. 1 is a diagram showing the circuit configuration of a conventional high-pressure sodium lamp with a built-in glow starter, and FIG. 2 is a diagram showing the circuit configuration of a high-pressure sodium lamp with a built-in starter according to the present invention. 1. Luminescence'l? , 2r 3... Electrode, 4... Glow starter, 5... Bimetal switch, 6-
,,J(antibody, 7...-ri,'i active auxiliary conductor, 9...
・Outside ball.

Claims (1)

[Claims] A light-transmitting ceramic tube is equipped with a pair of electrodes at both ends, and includes a luminous tube with starting rare gas and sodium amalgam sealed inside, a glow starter, a bimetallic switch, and a heat source for heating the bimetallic switch. A high-pressure sodium lamp with a built-in starter, characterized in that a series circuit of a body and a current-limiting resistor is connected in parallel to the arc tube and housed in a vacuum outer bulb.