SU1737562A1 - Mercuryless metal halogen lamp - Google Patents

Description

0.17-0.5

wavelengths of 600-700 nm, a very important plant growth rl. Therefore, the use of known lamps for photoculture of plants is inefficient

The aim of the invention is to increase the photoactive radiation of the lamp radiation.

This goal is achieved by the fact that in a mercury-free metal halide lamp containing a quartz burner with hermetically mounted electrodes, filled with xenon and additives to provide the burner with halogen emitting metals, the additives used to supply the burner with halides of cerium and lithium, while the molar ratio the amount of lithium to the amount of cerium is 1.5 3.5, the pressure of xenon is 66500-200000 Pa, and the components are taken in the following quantities, mol / cm x

Additives to provide burner cerium halides

Additives to provide a burner with lithium halides 0.09-0.7

In the lamp according to the invention, at the indicated proportions of the filling components, conditions are created under which the radiation of the lamp has a higher photoactive radiation than that of the lamp with the scandium-sodium content. In the proposed lamp, the radiation efficiency in the photoactive zone of the spectrum (380–7 U nm) is 15–20% higher than the corresponding for Na – Se lamps because of the higher radiation power in the conditionally red part of the AP-600–7 U nm region.

I

Structurally, the proposed lamp is no different from metal halogen lamps with an external balloon in a bonded design. The lamp design is determined by the fact that the use of xenon in the amount of buffer gas increases the ignition voltage. Therefore, a high-voltage electric pulse with an amplitude of at least 10 kV is required to ignite the lamp. In such conditions, single-base lamp design has a significant drawback - the high probability of electrical breakdown current lamps.

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The drawing shows the emission spectrum of the proposed lamp.

Despite the lack of visible,; mercury triplet (radiation lines

35, and 579 nm), the radiation of the lamp is characterized by a considerable saturation in the photoactive zone of the spectrum 380-710 nm.

As additives for providing the burner with halides of radiating metals (cerium and lithium) can be used.

cerium and lithium halides, i.e. directly emitting metal halides;

pure metals and halides of inactive metals, preferably tin, since its compounds are most environmentally friendly.

Me + SnX,

Menxm +

Sn

ABOUT)

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where Me is the radiating metal ,, n, m is the number of atoms; X - halogen.

cerium and lithium oxides, inactive metal halides and aluminum and / or silicon. In this case, the reaction is as follows (for example, lithium):

Li20 +

SnX 2 +

Al

Li I + Alj.Oj + Sn

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(2) Resulting from reactions.

O) and (2) metallic tin, -condensing on the cold parts of the burner, serves as a weatherization agent and practically performs the functions of a heat-insulating coating.

The amount of additives to provide the burner with lithium and cerium halides is selected from the conditions in which they provide the burner in sufficient quantity over the entire service life. It is determined experimentally in order to ensure a molar ratio between additives.

This ratio (the molar ratio of the amount of lithium to the amount of cerium), also determined experimentally, must be within the range of values, 5.

At values of this ratio, greater than 3, 5, the red component begins to prevail at the expense of the blue-green part of the spectrum.

At values less than 1.5, the emission of the lamp in the blue-green part of the spectrum

pa increases with the radiation damage in the red area of the HEADLAMP, which leads to a decrease in efficiency and radiation.

The xenon pressure was determined experimentally and should be 66500-200000 Pa.

At a lower pressure, the dimensions of the lamp unnecessarily increase when the power is fixed, since the gradient of the potential of the arc discharge decreases.

With a pressure greater than 20000C Pa, the lamp becomes highly explosive.

The lithium and cerium compounds used in the filling composition are non-toxic substances. A maximum allowable concentration (LDK) for lithium and cerium compounds is not provided.

Examples of specific performance are shown in the table.

The introduction of the proposed lamp makes it possible to increase the efficiency of the light of plants in comparison with the known metal halide lamps, which include

mercury. Compared to mercury, mercury logging lamps are offered and the lamp is more environmentally friendly.

Claims (1)

Invention Formula A mercury-free metal halide lamp containing a quartz burner with hermetically mounted electrodes, filled with xenon and additives to provide the burner with halogenides of radiating metals, characterized in that, in order to increase the photoactive radiation 5 lamps, as the above additives, additives were used to supply the burner with halides of cerium and lithium, the molar ratio of the amount of lithium to the amount of cerium is 1, 5, the pressure of xenon is 66500-200000 Pa, and the components are taken in the following amounts , mol / cm -10 6: Supplements to ensure halide burners cerium 0.17-0.5 Supplements to ensure halide burners lithium is 0.09-0.7. 0 five 1737562 Ј. § & f a i 5s I I I I I § 8 § § I I I § s; "-N Nj