SU974459A1 - Incandescent halogen lamp - Google Patents

Description

(54) HALOGEN LAMP. Filaments

The invention relates to the electrical industry, in particular to electric incandescent lamps with a tungsten-halogen cycle.

There are known hsshogenic Ls1mpy incandescent with a tungsten filament body, a gas filling containing nitrogen or inert gas and a halogen additive in the form of the compound C.N.Vg.- methylene bromide or methyl bromide. In order to bind harmful impurities, a getter from a phosphorus compound XW Pj or Pj N5 in an amount of 0.01-2 mg / cm of the flask volume l is introduced into the lamp volume.

However, it has been practically established that the operability of the getter depends on the value of the specific electrical load of the lamp and its location. 9-, N is most effective; It works in lamps that have a specific load on the walls of the flask of 6-30 W / cm at the location of the getter on the base of the flask. If the getter is applied to the filament body, then the getter concentration should be reduced to a very small value of 5–10 mega / cm flask volume, so. as with more of it (when you turn on the lamp;

a vaporized getter is formed on the surface of the bulb, resulting in absorption of the light flux or blackening of the lamp. But at the indicated concentration of the getter in the lamp (5-10 µg / cm), the efficiency of the gettering deteriorates and its dosage is difficult under the conditions of serial production of lamps.

The closest to the technical essence is a halogen incandescent lamp containing a tungsten filament body installed in a bulb on tokvvodov, stamped in the blade of the leg, filling, including inert gas and halogen-containing additives. For gettering of oxygen and water vapor, a red phosphorus getter was applied on the base of the lamp bulb, in an alcohol suspension with a density of 0.81 g / cm in an amount of 0.5-5 μl / cm of the volume of the flask 2.

Claims (2)

However, the specified scatter interval in the getter dosage is permissible only for lamps having a specific electrical load on a flask not exceeding 20 W / cm. If the load is higher, then it is necessary to reduce the amount of the getter injected, since during the operation of such lamps the base of the flask is heated to a higher temperature. As a result, fast evaporation of red phosphorus occurs with the formation of undesirable raids on the flask. The purpose of the invention is to increase the service life of halogen bulbs. The goal is achieved by the fact that a halogen filament lamp containing a flask filled with inert gas and a halo gene-containing additive, the HaKaJja body installed in it on the lead-in wires stamped into the leg blade and the phosphorus-containing getter It is provided with two communicating with the internal volume of the flask with the extended cavities made in the blade, the length of each of which is 1/5 - 1/2 the length of the blade in which the specified getter is placed. In addition, the content of the phosphorus getter in the cavities is 5-500 µg / cm of the flask volume. The drawing shows the proposed halogen lamp., Cut. The lamp contains a flask 1 filled with an inert gas and a halogen-containing additive, tungsten body 2 is heated, input 3 and conclusion 4, the ends of which are connected to the current lead - molybdenum foil 5, stamped in the blade 6. Support 7 of the body 2 is fixed in the shtagelny process. Along the upper part of the blade 6 there are two cavities 8, communicating with the internal volume of the flask and having a length of 1/5 - 1/2 of the length of the blade. Cavities serve to introduce a getter into them. The getter is administered in the form of a suspension consisting of red phosphorus or its compounds, for example, polyphosphonitride or polyoxyphosphonitride ROM, and ethyl alcohol. Moreover, the content of phosphorus in the cavity is 5-50 µg / cm of the flask volume, and polyphosphonitride P, Ng- or polyoxyphosphonitride nitride - 10-500 µg / cm of the flask volume. When the lamp is in operation, the temperature of the internal cavities where the getter is located is set significantly lower than the temperature at any other point inside the flask. Evaporation or disintegration. A getter does not occur immediately after the lamp is turned on, but for a long time. This allows the getter to be introduced into the lamp with a certain reserve, without fear of the formation of deposits on the surface of the flask. The result is a getter lamp throughout. lamp life. Moreover, the lamp may have a wider range of specific loads on the walls of the bulb 5-60 W / cm H The proposed lamps have an increased blade strength, better quality than the known ones. In addition, the manufacturing techniques of the proposed lamps are not complicated. The results of the comparative tests showed that lamps containing a getter in polbsters have 1.21, 8 times longer burning times than test lamps. Claim 1. A halogen incandescent lamp containing a flask filled with inert; A low-pressure gas with a halogen-containing additive, the filament body installed in the flask with the help of current leads, stamped in the blade, and a phosphor-containing getter, characterized in that, in order to increase the service life, it is provided with two communicating with the internal flask volume blades made in the blade, the length of each of which is 1/5 - 1/2 the length of the blade in which the specified getter is placed. 2. The lamp according to claim 1, wherein the amount of the phosphorus getter with respect to the volume of the flask is 5 1500 µg / cm. Sources of information taken into account in the examination 1.Patent of France No. 2172352, cl. H 01 K 1/56, 1973. 2. USSR author's certificate for application 2314521 / 24-07, cl. H 01 K 1/54, 1979.