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Electrode assembly

A technology of electrode assembly and discharge end, which is applied in the field of electrode assembly, can solve problems such as temperature increase, weakening arc tube temperature, and affecting lamp performance, so as to ensure the working pressure and increase the temperature of the cold end.

Inactive Publication Date: 2010-12-01
CHAOZHOU AUBADE LIGHTING
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AI Technical Summary

Problems solved by technology

The electrodes of the above two structural forms have unavoidable defects in both the structure itself and the sealing method, which affect the performance of the whole lamp
[0003] Due to the existence of the molybdenum helix in the prior art, metal halide vapor will inevitably permeate into the metal halide vapor and condense in the gap around the cold end of the molybdenum helix and its gap during repeated ignition, which will cause the color temperature and light effect of the lamp to gradually decrease. Changes; due to the use of tungsten, molybdenum and niobium materials as electrode components, the high thermal conductivity of the molybdenum connecting rod causes the heat of the arc tube to be directed to the end of the capillary, increasing its temperature, which in turn weakens the temperature of the arc tube and affects the use of the lamp performance

Method used

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Examples

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Embodiment 1

[0038] Example 1 150W ceramic metal halide lamp three-segment electrode, such as figure 2 , the specific dimensions of each part of the electrode assembly described in this embodiment are: the diameter of the tungsten mandrel is ΦA1: 1.2mm, the length A1: 6.0mm, the discharge end of the tungsten mandrel is semicircular; the diameter of the cermet rod is ΦA2: 1.2mm, Length A2: 13mm; outer lead diameter ΦA3: 0.8mm, length A3: 11.5mm, two positioning pieces are welded at the end of the cermet. All parts are laser welded.

Embodiment 2

[0039]Example 2 150W ceramic metal halide lamp two-stage electrode, such as image 3 , the specific dimensions of each part of the electrode assembly described in this embodiment are: tungsten electrode diameter ΦB: 1.2mm, length B1: 6.0mm, electrode head is semicircular; cermet rod diameter ΦB: 1.2mm, B2: length 18mm The limiting structure is located 6 mm away from the top of the cermet rod. All parts are laser welded.

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Abstract

The invention discloses an electrode assembly structure. The structure comprises a tungsten mandril, a metal ceramic rod and a lead structure which are connected in turn, wherein one end of the tungsten mandril is a discharge end, the other end of the tungsten mandril is connected with one end of the metal ceramic rod, and the other end of the metal ceramic rod is connected with the lead or the metal ceramic rod directly used as the structure of a leading-out wire; and the outer diameter of the tungsten mandril is equivalent to that of the metal ceramic rod. The electrode assembly structure can effectively prevent the excessive conduction of heat to a tail end of the electrode assembly and ensure the excellent performance of a finished lamp in all aspects.

Description

technical field [0001] The present invention relates to an electrode assembly. Background technique [0002] At present, the global ceramic metal halide lamp arc tube manufacturers mainly use the following two electrode structures: the first structure, such as figure 1 As shown, the tungsten core rod 1 with the tungsten spring 4, the molybdenum rod 2 with the molybdenum helix 5 and the niobium rod 3 used as the outer lead are respectively welded together by laser welding, or The niobium rod and the molybdenum rod closely wound with molybdenum helix are connected by electron beam welding, which is a three-stage electrode structure of tungsten-molybdenum-niobium non-equal diameter structure, which is adopted by most electric light source companies in the world; This kind of structure is that a few domestic and foreign companies use cermet rods instead of molybdenum rods as connecting rods or add one end of cermet rods between molybdenum rods and niobium rods. The electrodes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/06
CPCH01J61/0735H01J61/0732
Inventor 张万镇谢灿生陆镇洲杨双节
Owner CHAOZHOU AUBADE LIGHTING
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