RU2415492C1 - Gas-discharge lamp - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: gas-discharge lamp comprises a burner from optically transparent material, containing inert gas, alkaline metal and/or a radiating composition, generating radiation in optical area of spectrum. Source of supply is source of supply of impulse-periodic action, having duty current, I duty, from 0.06 A to 0.15 A, and for capacity of gas-discharge lamp, D_l, W, amplitude of periodic current impulse, I_{a, per}, A, frequency of periodic current impulse, ν, Hz, and time of periodic current impulse passage, Timp., sec, the following ratio is met:

where K - coefficient of proportionality with dimension of A/W numerically equal to 1.0.

EFFECT: improved energy efficiency of lamp in optical area of spectrum.

Description

The present invention relates to the electrical industry, in particular, improves gas discharge lamps of high and low pressure.

Known gas discharge lamp connected to a power source, including a burner made of optically transparent material containing inert gas and mercury, generating, in an arc discharge, radiation in the optical region of the spectrum (Rokhlin G.N. Discharge light sources. - M .: Energoatomizdat, 1991 p.).

In the analog lamp, the only emitting element is mercury, which has four fairly intense lines in the visible region of the spectrum: 404 nm, 436 nm, 546 nm and a doublet line 577/579 nm, which ensures the light output of the lamps at 55.0-60, 0 lm / W.

The disadvantages of the described lamp are insufficiently high light output and low environmental friendliness of the structure due to the presence of extremely toxic mercury in the composition of the filling components.

The closest in technical essence is a gas discharge lamp connected to a power source, including a burner made of optically transparent material, containing an inert gas, alkali metal and / or radiation composition generating radiation in the optical spectral region (RF patent No. 2066500 "Metal halide lamp").

In the prototype lamp, as an option, mercury is not used in the filling composition and, therefore, its environmental friendliness is much higher than that for the analog lamp.

The disadvantage of the prototype lamp is low energy efficiency in the optical spectrum. In the visible region of the spectrum, the light output of the lamps is up to 75.0 lm / W, which, according to modern concepts and requirements, is insufficient.

The technical task of the proposed solution according to the invention is to increase energy efficiency in the optical spectrum.

This object is achieved in that in a gas discharge lamp connected to a power source including a burner of optically transparent material containing an inert gas, alkali metal and / or radiation composition generating radiation in the optical region of the spectrum, the power source is a pulse-periodic power source actions having a standby current, I dezh., from 0.06 A to 0.15 A, and for a gas discharge lamp power, R _l , W, pulse amplitude of a periodic current, 1 _{A, per} , A, pulse frequency of a periodic current, v Hz transit time of periodic current pulse, T _imp, s, the following relation holds:

where K is the coefficient of proportionality, having a dimension of A / W and numerically equal to 1.0.

In the gas discharge lamp according to the invention, experimentally selected filling composition and a pulsed-periodic power supply allow you to create a highly efficient radiation source in the optical region of the spectrum. In the visible region of the spectrum, the proposed radiation source provides, in a mercury-free, environmentally friendly design, experiments show that the light output is from 150 to 200 lm / W.

The burner may contain an inert gas and an alkali metal (e.g. lithium, sodium, cesium, rubidium), an inert gas and a radiation composition (e.g. iodides and bromides of indium, scandium, dysprosium, holmium, thulium, etc.). Finally, the burner may contain an inert gas, an alkali metal (e.g. lithium, sodium, cesium, rubidium) and a radiation composition (e.g. iodides and bromides of indium, thallium, scandium, dysprosium, holmium, thulium, etc.).

Inert gas is necessary to protect the electrodes during the transition of lamps from standby to working.

Alkali metals are necessary to increase the conductivity of the gas discharge gap and to stabilize the discharge arc. In addition, they themselves are able to generate radiation (cesium, sodium) with an efficiency of up to 150 lm / W.

The choice of ingredients, in the form of metal iodides and bromides, depends on the spectrum of radiation that you wish to receive from the proposed discharge lamp. For example, indium halides are used to obtain blue radiation, thallium halides are used to obtain green radiation, dysprosium, holmium, thulium halides are used to produce white radiation.

As a result of experimental checks, the value of the standby current was determined - from 0.06 to 0.15 A.

With a standby current of less than 0.06 A, when a gas discharge lamp is ignited, the lamp ignition period significantly increases (up to 10.0-15.0 min), which, in general, reduces the lamp radiation efficiency and, in addition, reduces the lamp burning time, since the heating period of the lamp current exceeds the nominal.

With a standby current of more than 0.15 A, when a gas-discharge lamp is ignited, a sharp increase in the potential difference (intensity) of the electric field of the arc discharge occurs, which leads to atomization of the electrodes and, consequently, a decrease in the useful life of the lamps.

Very important is, it is determined experimentally, the value of the ratio of the parameters in the formula (1 *).

It should range from 2.14 to 37.5 units, as determined experimentally.

With a lower value of this ratio, the lamp life is sharply reduced due to high levels of electric field of the arc discharge.

With a larger value of this ratio, the service life of the proposed lamp is also reduced, but due to field emission of electrons from the electrodes, resulting in erosion, which determines the decrease in the lamp life.

The current strength in each period should be 25-35 A, and its duration should be from 10 ^-4 to 10 ^-3 sec.

The lamp performance was experimentally tested at a power of 125 W to 400 W.

Executions of the table are given in the table.

Execution of the proposed discharge lamp No. p / p Options. Parameter value for lamp versions one 2 3 four one Lamp power, R _l , W 150 250 400 500 2 Amplitude of current pulses, I _{A, per} , A 12.5 20,0 28.0 35.0 3 Frequency of current pulses, v, 1 / sec, Hz 900 1000 1200 1500 four The duration of the current pulses, T, sec 10 ^-3 3 * 10 ^-4 5 * 10 ^-4 10 ^-4 5 The value of the ratio (1 *) 11.25 37.5 8.57 2.14

The implementation of the invention allows to increase the light output of sodium lamps, for example, with a power of 250 W from 90 lm / W to 150 lm / W, which at the same price is 300 rubles / pc. - and an average burning time of 12,000 hours - with an annual production plan of 10,000 pcs / year, it gives an economic effect of 2.0 million rubles.

In addition, the proposed discharge lamps, as an option, can be manufactured in a mercury-free, environmentally friendly design, which is also an important factor in the conditions of progressive pollution of the natural and air environment by harmful products of human industrial activity.

Claims (1)

A gas discharge lamp connected to a power source including a burner of an optically transparent material containing an inert gas, an alkali metal and / or a radiation composition generating radiation in the optical region of the spectrum, characterized in that the power source is a pulse-periodic power source having _standby current I _dezh. from 0.06 ν to 0.15 A, and for the power of a discharge lamp R _l , W, pulse amplitude of the periodic current I _{A, per} , A, pulse frequency of the periodic current ν, Hz, and transit time of the pulse of the periodic current T _imp , s , the following relation holds:

where K is the coefficient of proportionality, having a dimension of A / W and numerically equal to 1.0.