SU1241305A1 - Gaseous-discharge lamp - Google Patents

Abstract

The invention relates to gas discharge light sources (ICs) intended for outdoor illumination of objects at low ambient temperatures. The aim of the invention is to reduce the ignition voltage of such ICs with the preservation of the high stability of the light flux. IP contains the outer shell 1, int. Which is located quartz tube (CT) 2 with an inner diameter d. At each of the ends of the QD, the main electrodes 6 and at least one ignition electrode 7 are hermetically sealed with current leads. The QDs are filled with inert gas and mercury under a certain pressure P. The lowered ignition voltage of the IC at low temperatures is due to the fact that d, t, and P are related by the ratio Pl / d 38-64. Such a relationship allows the ignition voltage to be reduced, not only by changing P i, but also by increasing the QD diameter, while maintaining the high stability of the light flux. I il, 2tabl. with about with

Description

ten

15

20

25

The invention relates to the electrical industry, in particular to gas-discharge light sources intended for outdoor use. whom the objects are illuminated at low ambient temperatures, for example in the regions of Siberia and the North.

The purpose of the invention is to reduce the ignition voltage of lamps at low ambient temperatures while maintaining high stability of the light flux.

The drawing shows the design and gas discharge lamp.

The gas discharge lamp contains an outer shell 1, inside of which there is a quartz tube 2 with an inner diameter d filled with an inert gas — argon 3 — pressure P and mercury 4. At each end of the tube at distance 1 by means of current leads 5 hermetically sealed electrodes 6 and at least one ignition electrode -7 located inside tube 2 near the corresponding main electrode.

The ratio of the values of P, I, d is due to the fact that the ignition voltage depends not only on P and 1, but also on the internal diameter of the quartz tube (with an increase in the internal diameter, the voltage decreases). As a result, the stability of the luminous flux is maintained.

Experiments were performed in the temperature range from +40 to an experimental lamp of a special KOHCTjpyKtion, where the radius of the quartz tube and, if necessary, the distance between the main electrodes could be changed under all other constant other conditions.

A change in any one of these values (the other two remain unchanged) does not provide a decrease in the ignition voltage while maintaining a high stability of the luminous flux.

A decrease in the ignition voltage of the lamps with an increase in the diameter, with all other conditions being equal, allows the lamps to be lit with a mains voltage of 220 V at low ambient temperatures while maintaining the required stability of the luminous flux. In addition, at normalized ignition voltages at low ambient temperatures, you can increase

pressure of the argon gas filling the quartz tube compared to the known value and increase the

the most stable light flux

5 lamps in the course of service life. In this case, an increase in the ignition voltage due to an increase in argon pressure is compensated by a decrease in the ignition voltage due to an increase in diameter.

So the lower limit

40

45

50

S5

J

P -t- - 38 values are limited to preserved d

Notion: high stability of light

th stream, in the upper limit of P-t-

 64 maximum permissible value of ignition voltage.

B table.1 shows the parameters proposed, and table. 2 famous lamps.

From tab. As can be seen from Fig. 1, when the snowing limit of 38 is met, the lamps are ignited at a voltage of 220 V at -25 g40 ° C. However, the magnitude of the luminous flux of the lamp after 3600 hours of burning is already at the limit of the allowable decrease in luminous flux. Therefore, the ratio p 2 38

thirty

R

p - it is not advisable, since there will be a discrepancy between the lamps by the allowable decrease in the luminous flux during the service life.

With an upper limit of 6A, the lamps are ignited with a voltage of 220-235 V at. And 285-302 in at -40 s. In this case, the value of the ignition voltage is close to the maximum permissible value. Therefore, the ratio of P 64

d

It is impractical because there will be a mismatch between the lamps in terms of the allowable ignition voltage at low ambient temperatures.

The decline of the luminous flux of the lamps in the process of service life at the peak of the upper limit is much less than permissible.

In tab. 2 presents the values

I, d, /, ratio 1

J giving

P of the filling of a quartz argon gas tube, the ignition voltage of the lamps at -25, and the luminous flux of the lamps during the period of time are 100 and 3600 hours of burning.

J

P -t- - 38 values are limited to preserved d

Notion: high stability of light

th stream, in the upper limit of P-t-

 64 maximum permissible value of ignition voltage.

B table.1 shows the parameters proposed, and table. 2 famous lamps.

From tab. As can be seen from Fig. 1, when the snowing limit of 38 is met, the lamps are ignited at a voltage of 220 V at -25 g40 ° C. However, the magnitude of the luminous flux of the lamp after 3600 hours of burning is already at the limit of the allowable decrease in luminous flux. Therefore, the ratio p 2 38

R

p - it is not advisable, since there will be a discrepancy between the lamps by the allowable decrease in the luminous flux during the service life.

With an upper limit of 6A, the lamps are ignited with a voltage of 220-235 V at. And 285-302 in at -40 s. In this case, the value of the ignition voltage is close to the maximum permissible value. Therefore, the ratio of P 64

d

It is impractical because there will be a mismatch between the lamps in terms of the allowable ignition voltage at low ambient temperatures.

The decline of the luminous flux of the lamps in the process of service life at the peak of the upper limit is much less than permissible.

In tab. 2 presents the values

I, d, /, ratio 1

J giving

P of the filling of a quartz argon gas tube, the ignition voltage of the lamps at -25, and the luminous flux of the lamps during the period of time are 100 and 3600 hours of burning.

From tab. 2 it can be seen that the ratio R-- exceeds the upper limit

value, the ignition voltage when it exceeds the mains voltage of 220 V and its value is higher than in table. I. The magnitude of the decay of the luminous flux in the process of service life is also at the limit, i.e., as

i

and in table. on the lower limit of P - 38.

Decrease the value of P --- less

but

specified in the table. 2 for these lamps is impractical because the magnitude of the decrease in the luminous flux of the lamps during the service life increases,

2 Increase the P-7- pain

above specified in tab. 2 for these lamps is impractical because the magnitude of the ignition voltage in 413054

This is the closest and maximum allowable value.

Claims (1)

Invention Formula five The discharge of the lamp, containing a quartz tube filled with an inert gas, at each end of which is sealed with current leads 10, a main electrode and at least one ignition, located near the corresponding main electrode, are installed so that, in order to lower 5 the ignition voltage at low ambient temperatures, from being preserved. high stability of the light flux, the distance between the main electrodes 2, mm, internal 20 The diameter of the quartz tube d, mm, and the filling gas pressure P, Torr, are related by the following relation P 1 38-64. but about cm about CSI cho - CN1OO P vf vO IT) Ji o Och WITH h but v 00 with with - CTN g with from cm Vd CS -and about with and about about Gh Ltd