JPS6056355A - Starter built-in type high pressure sodium lamp - Google Patents

Abstract

PURPOSE:To enable a secure start under all operating conditions by connecting a series circuit consisting of a glow starter, a bimetal switch, and a resistor that heats this bimetal switch in parallel 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, a series circuit built up with a glow starter 4, a bimetal switch 5, and a resistor 10 including a tungusten filament that heats the bimetal 5, and such is connected in parallel to the luminous tube 1. Furthermore, a starting auxiliary conductor 6 is attached on the external surface of the luminous tube 1 and a second bimetal switch 7 that disconnects the potential to the auxiliary conductor 6 while a lamp is operating is provided. As a result, the lamp can securely be started under all operating conditions.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in a high-pressure sodium 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 the switch to open the circuit. , and one using a close starter.

Among these, in the bimetal switch method, the opening of the bimetal switch is carried out inside the vacuum outer sphere, so when the circuit is opened, no energy is stored in the ballast. The proportion of electromagnetic energy consumed by the bimetal switch's contact discharge V is small, and an inherently higher pulse voltage can be obtained compared to the close starter method. Depending on the opening speed of the bimetallic switch, the height of
Since it is possible that a pulse voltage of KV may be generated from the lamp, it is necessary to take sufficient care to insulate the lighting circuit1.On the other hand, in the case of the close starter method, the opening of the contacts of the glow scooter is caused by the close starter. Since this is carried out in a rare gas sealed in the ballast, part of the electromagnetic energy of the ballast when the circuit is open is lost due to the group 71 mo between the contacts, and the pulse voltage does not exceed a certain value (approximately 2KV). It can't be.

In other words, in the close starter system, the magnitude of the maximum pulse voltage can be controlled to some extent by the composition and pressure of the gas filled in the glow starter.
There is no need to pay any attention to the insulation of the lighting circuit in the case of a bimetal switch type. For this reason, the glow starter method is often adopted for low-wattage, high-pressure sodium lamps that do not require a very high pulse voltage to start discharge in the arc tube.

An example of the circuit configuration of such a conventional high-pressure sodium pump with a built-in glow starter is shown in Fig. 1. In Fig. 1, reference numeral 1 denotes an arc tube, and inside it, along with sodium amalgam, 100% of gysenon is used as a starting rare gas. ~20o
Enclosed at a pressure of Torr2. . 2 and 3 are electrodes and a 4-place closed starter. 6 is a bimetallic switch, but this is not intended to generate a pulse voltage; it becomes open circuit due to the radiated heat from the arc tube 1 during operation of the lamp, and its role is to cut off the potential to the glow starter. It is something that we fulfill. Reference numeral 6 denotes an auxiliary conductor for starting, and a second bimetal switch 7 prevents the electric potential from being applied to the starting auxiliary conductor while the lamp is in operation.

8 is an outside ball.

When an AC main color voltage is applied to the lamp configured in this manner through the ballast 9, the close starter 4 starts operating after 1 to 2 gauzes, and thereafter 1. fb fg+ several dozen times 1j
? The ballast 99'C pulse voltage is generated at l1fj
'r'j? Is it a power supply? (The discharge of the arc tube 1 starts within 6 seconds after the application of the +' pressure.However, we conducted startup experiments under various conditions for a large number of these discharge lamps, and found that although the generated soil was small, the discharge of the arc tube 1 started as follows. I found out that a similar problem can occur. Namely, after the 0° lamp was started, it would turn on and off for only a few seconds, and when I tried to start the lamp again after it had cooled down sufficiently, the glow scooter 4 was working normally. Despite this, discharge of arc tube 1 started,
It was found that there was no lamp. This is because the lamp was turned on for only a few seconds, and the arc tube 1
This is thought to be due to the fact that it became difficult to start.

That is, when the lamp is turned off after reaching a stable state as usual, the sodium amalgam that was present in gaseous form in the arc tube 1 during lighting condenses behind the electrodes 2 or 3 at the end of the arc tube 1. do. If you skip starting the lamp in such a state, when the discharge starts, the sodium amalgam that has been condensed behind the electrodes 2 or 3 will scatter and spread onto the inner wall of the arc tube around the nearby electrodes. Adheres in a mirror-like manner. During normal lighting, when the temperature of the arc tube 1 increases and the lamp enters a stable state, all the sodium amalgam attached to the inner wall of the arc tube around the electrodes evaporates, and some of the sodium amalgam remains behind the electrodes. When the lamp is turned off a few seconds after it starts, the Natriuno asurgum that forms a mirror-like appearance on the inner wall of the arc tube around the electrodes remains intact. In this situation, restart the lamp after cooling it! lll1-'u, a mirror-like amalgam is provided on the outer surface of the arc tube 1, and a shield is provided between the starting auxiliary conductor 6 and the electrode 2 or 3 (this is not intended to be present at 7). This is considered to be one of the reasons why the arc tube 1 is in a troubled state when it starts.
When a pulse voltage higher than the pulse voltage from the close starter is applied from the outside, it starts normally, and thereafter operates without any problem under normal usage conditions.

This phenomenon is observed only in a small proportion of lamps manufactured under the same manufacturing conditions, and the reproducibility of the phenomenon in the same lamp is not high. , 1 (i) may not necessarily occur due to the circumstances, and in that case, the lamp must be converted to t.

Purpose of the Invention The present invention was made in view of the above circumstances, and provides a built-in starter that operates normally even when the arc tube becomes difficult to start under the above-mentioned special conditions of use. The object of the present invention is to provide a high-pressure sodium lamp.

Structure of the Invention To achieve the above object, the high-pressure sodium lamp embedded in a starter of the present invention emits light using a series circuit of a close starter, a bimetallic switch, and a resistor for heating the bimetallic switch. It is connected in parallel with the tube and housed inside the vacuum outer sphere.

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

FIG. 2 shows an example of a circuit configuration of a thorium lamp that is shaped inside a starter according to the present invention.

In the figure, 1 is an arc tube made of translucent ceramic;
Both areas 1 are equipped with electrodes 2 and 3.

100 with hothorium amalgam in arc tube 1
~200 Torr of xenon is enclosed. 4?
:J Nigero starter, 5 is bimetal switch, 10
A resistor for heating the bimetal switch 6 is made of, for example, a tungsten filament. Reference numeral 6 denotes a starting auxiliary conductor attached to the outer surface of the arc tube 1. 71zl: A second bimetal switch for cutting off the potential to the starting auxiliary conductor 6 during lamp operation.

8 is an outside ball.

When the high-pressure sodium lamp with a built-in glow starter according to the present invention configured in this manner is connected to a power source via the ballast 9, normally, as in the case of a conventional high-pressure sodium lamp with a built-in glow starter, After 1 to 2 seconds, the glow starter 4 starts operating, and within about 6 seconds, the electrode 2 of the light emitting v1
And the discharge for 3 hours starts. When the arc tube starts discharging, the voltage between the terminals of G:R and Scooter 4 increases from 2Q to 40
V, the glow scooter 4 (drive 1') is stopped. When the arc tube 1 reaches a stable state, the L rebimetal switch 5 opens to the radiant heat from the arc tube 1, and the glow scooter The voltage application to 4 is cut off.

Then, as mentioned above, a few seconds after starting the lamp i+, 81-
When the C light goes out and it becomes difficult to start, the glow scooter 4 continues to operate because the discharge of the arc tube 1 does not start with the pulsed electricity EE caused by the operation of the close starter 4. Close scooter 4 (to the current flowing in)
@jT of resistor 10! , rises, and after 5 to 10 seconds, the bimetal switch 5 is opened.

At that time, a pulse voltage of 2 to 3 KV is generated in the ballast 9, and discharge of the arc tube 1 starts. If the discharge of the arc tube 1 does not start due to the first opening of the bimetal switches, the bimetal switch 5 closes again after 2 to 3 seconds, repeating the operation from the beginning, and emitting light. The discharge of tube 1 begins.・In order to shorten the time for re-closing after opening of the metal switch 6, it is preferable to keep the heat capacity V of the nockle switch 5 and the heating resistor 10 as small as possible. The heating resistor 10 is preferably constructed from a tungsten wire filament.

The effect of the invention is as follows: As explained above, the present invention adds a heating resistor to 0, which ensures that the jimp X"C will start reliably under all conditions of use. It is possible to sweep the high-pressure sodium hydroxide molded inside the starter that has a stray/.- effect.

[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 Li/Lium lamp with a built-in starter according to the invention. 1... Arc tube, 2, 3... Electrode, 4... Close scooter, 6-- Bimetal switch, 6... Auxiliary conductor for starting, 8... 1 bulb, 10, Heating resistor. )°. body.

Claims (1)

[Claims] A luminous tube consisting of a translucent ceramic tube with a pair of electrodes at both ends and filled with starting gas, Natrium J, and amalgam, a glow starter, a bimetallic switch, and a resistor for heating the bimetallic switch. A high-pressure sodium run with a built-in starter, characterized in that a series circuit with the body is connected in parallel to the arc tube and housed in a vacuum outer bulb.