High pressure sodium vapour lamp

Abstract

The electrode was airtightly fixed to one end of the conductive tube with titanium solder, and at the same time the other end of the conductive tube was closed, thereby forming the conductive tube airtightly, and argon gas was sealed inside. The conductive tube is hermetically sealed in a light-transmitting alumina tube with a sealing agent. Sodium amalgam is set in the light-transmitting alumina tube. The present invention can provide such a high-pressure sodium vapor lamp, that is, while preventing the deformation of the conductive tube, by arranging the luminescent substance sodium in the luminous tube, the light color change and the lamp voltage change during the journey can be prevented, and the time required from lighting to lighting stability can be shortened. time and suppress the dispersion of the lamp voltage.

Description

Technical field [0001] The invention relates to a high-pressure sodium vapor lamp, in particular to a luminous tube structure of a high-pressure sodium vapor lamp with good lighting effect. Background technique [0002] An example of the luminous tube structure of a conventional high-pressure sodium vapor lamp is shown in FIG. 3. The conventional high-pressure sodium vapor lamp has a conductive tube 33 and an electrode 32 fixed to one end of the conductive tube 33 by using a titanium solder 31. In addition, the other end of the conductive tube 33 serves as an open end. [0003] The conductive tube 33 is installed on one end of the light-transmitting alumina tube 34, and the mounting part of the conductive tube 33 in the light-transmitting alumina tube 34 is hermetically sealed by a plugging agent 35 made of ceramic glue. The sodium amalgam 36 is enclosed in the inner end of the light-transmitting alumina tube 34. [0004] In the above-mentioned traditional luminous tube structure...

AI Technical Summary

Problems solved by technology

[0008] The first problem is that since the electrodes shield the heat generated by the arc discharge between the electrodes that becomes the heat source during lighting, the sodium amalgam held in the conductive tube is less likely to be heated, so the time required from lighting to stable lighting is prolonged.

[0009] The second problem is that since the temperature of the coldest part changes when the position of the conductive tube deviates during plugging, compared with the structure in which the sodium amalgam is placed at the inner end of the power tube where the temperature change is small, as shown in Figure 3 , the lamp voltage deviation increases during production

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