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INVENTION
Patent of the Russian Federation RU2095884
COMPACT LUMINESCENT LAMP
Applicant's name: Open Joint-Stock Company "Moscow Electric Bulb Plant"
The name of the inventor: Shevtsov AI; Polivin S.N.
The name of the patent holder: Open Joint-Stock Company "Moscow Electric Bulb Plant"
Address for correspondence:
Date of commencement of the patent: 1995.10.23
Purpose: The invention relates to the design of luminescent light sources.
The technical result of the invention is to improve the processability and reduce the recession of the lamp's light flux. SUMMARY OF THE INVENTION: the constriction elements forming the cooling zone of the vapors of the working substance are made with a cylindrical and / or conical surface, the axes of which form a crossed line with the axis of the discharge tube.
DESCRIPTION OF THE INVENTION
The invention relates to lighting engineering , namely to the design of luminescent light sources whose discharge tube diameter does not exceed 16 mm, and intended to replace incandescent lamps in luminaires used in production or domestic conditions. During operation of the fluorescent lamp in the discharge tube, a gas discharge of low pressure is created, which is the source of ultraviolet radiation absorbed by a thin layer of phosphor deposited on the inner surface of the discharge tube and re-emitting absorbed energy in the visible part of the spectrum. In working lamps, the optimum vapor pressure of the working substance can be achieved by maintaining a small portion of the discharge tube at lower temperatures, i.e. by creating so-called cooling zones in which the vapor of the working substance condenses.
A compact fluorescent lamp (CFL) is known , containing a discharge tube in the form of a bifilar spiral filled with a working substance with current leads fixed at each end of the glass tube. The sealed tube is provided with a cooling zone formed in the middle portion of the helix and formed by the tube expansion portion [1]
The disadvantage of the known solution is the non-technological design of the cooling zone, since the creation of the expansion site requires the implementation of special technological methods associated with the creation of excessive pressure of the gas medium in the tube and strict control of the expansion of the tube section, which are not described in the description of the invention, but it can be assumed that these The funds are quite complex. In addition, the location of the cooling zone in the upper part of the spiral increases the overall dimensions of the compact lamp, which is undesirable for this type of product.
A fluorescent lamp is known , comprising a sealed, rectilinear glass tube filled with a working substance, current leads fixed at each end of the tube. The sealed tube is provided with a cooling zone for the vapors of the working substance formed by the sections of the narrowing of the tube cross-section in the form of grooves oriented along the axis of the lamp [2]
The disadvantages of the known fluorescent lamp are the non-technological design, as well as the rapid decrease in the luminous flux caused by the burnout of the phosphor on the extended base of the groove under the influence of the high density of the gas discharge radiation.
The last of the described analogues of US Pat . No. 2,915,664 is accepted as a prototype, since it coincides with the claimed solution for most of the main essential features.
The technical result of the invention is to improve the processability and reduce the recession of the lamp's light flux.
The essence of the invention is expressed by the following set of essential essential features: a compact fluorescent lamp comprising a sealed glass tube filled with a working substance provided with current leads and a phosphor coating and formed with cooling zones formed by the tube constriction portions, characterized in that the constriction members are in the form of a cylindrical and / Or a conical surface, the axes of which form crossing lines with the axis of the discharge tube. The above set of characteristics is sufficient to achieve the technical result provided by the invention.
The prior art does not disclose solutions that contain features that coincide with the features contained in the distinguishing part of the independent claim of the claimed invention. In the claimed invention, it is the distinctive features given in the independent claim of the formula that ensure the achievement of this technical result.
 FIG. 1 shows a fragment of an axial section of a discharge tube according to the invention |
 FIG. 2 shows section AA in FIG. 1 |
 FIG. 3 is a plan view of a CFL, the discharge tube of which is designed as a bifilar spiral according to the invention |
 FIG. 4 the same, top view |
 With a local cut along the cooling zone: FIG. 5 is a fragment of a U-shaped CFL with an example of the location of the cooling zone on the bridge between parallel sections of the discharge tube |
 FIG. 6 is a plan view of an annular CFL with an example of the location of the cooling zone |
The CLL contains a sealed glass tube 1 filled with a working substance with the working vapors 2 constricted on it, constituted by constriction elements 3, the surface of which is made in the form of a cylindrical and / or conical surface, the axes of which form crossing lines with the axis of the discharge tube. There is no need to graphically show the various forms and locations of the constriction. To illustrate the essence of the invention, the illustrations shown in the figures are sufficient. To select the optimal contraction value, it is preferable to use the following relationship:
0.6 <S / s <1.0,
2;
S the cross-sectional area of the tube in the narrowing section 3 or 4, mm 2 .
From the point of view of the technology of making narrowing, the simplest is the implementation of an element providing such a narrowing from the center of curvature of the constriction section. And the size of the element providing the constriction can be easily changed due to the forming tool.
CLAIM
A compact fluorescent lamp comprising a discharge tube filled with a working substance and equipped with a cooling zone for the vapors of the working substance formed by the narrowing portions of the discharge tube, characterized in that the constriction portions are constituted by constriction elements formed with a cylindrical and / or conical surface, the axes of which form crossing lines with Axis of the discharge tube.
The lamp according to claim 1, characterized in that the length of the cooling zone along the axis of the tube does not exceed three of its diameters.
The lamp according to claims 1 and 2, characterized in that the ratio of the cross-sectional area of the tube in the region not having the constriction to the cross-sectional area of the constriction is greater than 0.6, but less than unity.
A lamp according to any one of claims 1 to 3, characterized in that the tube is narrowed from the center of curvature of the constriction portion.
print version
Date of publication 12.11.2006гг
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