Low-pressure mercury electric-discharge lamp and ultraviolet disinfection and sterilization device

A technology of discharge lamps and ultraviolet lamps, which is applied to low-pressure discharge lamps, parts of gas discharge lamps, and light water/sewage treatment, etc., which can solve problems such as difficult to guarantee consistency, reduce lamp manufacturing costs, and reduce efficiency, and achieve improved Lamp current density, high output power, and system cost reduction effects

Active Publication Date: 2014-01-01
何志明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the amalgam is selected to be placed in the exhaust pipe, due to the large temperature difference in the exhaust pipe and the change of the ambient temperature, it is difficult to guarantee the consistency of each lamp, and the light output of the lamp fluctuates greatly with the change of the ambient temperature.
[0010] Therefore, it is not difficult to draw from the above description of the prior art that the method of increasing power by increasing the current density is subject to two restrictions: one is that the light output will tend to be saturated (that is, not increase) with the increase of the current, and the lamp current increases, and the electrons Collision loss and tube wall recombination loss increase, the efficiency of converting electric energy into 253.7nm ultraviolet energy in the low-pressure mercury discharge lamp decreases, and the 253.7nm ultraviolet output gradually tends to saturation with the increase of current. For a specific tube diameter, the tube current density has an optimization The value range of , cannot be infinitely increased
Second, there is a lack of amalgam with superior high temperature performance
[0011] That is to say, there are the following deficiencies in the prior art: 1. In the current low-pressure mercury discharge lamp, when the tube current density rises to make the tube wall work at a temperature exceeding 170°C, the existing amalgam cannot stably control the lamp under this high temperature condition. When the internal mercury vapor pressure is in a suitable range, the light output of the lamp is greatly reduced, and the light efficiency is low, which makes it impossible to further reduce the volume of the lamp and reduce the cost of making the lamp
2. When the current density of the existing low-pressure mercury discharge lamp increases, the environmental adaptability is poor, and the light output of the lamp (including visible light and ultraviolet light) fluctuates greatly
3. The existing low-pressure mercury discharge lamps cannot meet the needs of ultraviolet disinfection and sterilization

Method used

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  • Low-pressure mercury electric-discharge lamp and ultraviolet disinfection and sterilization device
  • Low-pressure mercury electric-discharge lamp and ultraviolet disinfection and sterilization device
  • Low-pressure mercury electric-discharge lamp and ultraviolet disinfection and sterilization device

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preparation example Construction

[0104] Correspondingly, the present invention also provides a method for preparing the indium-mercury alloy or indium-mercury multi-element alloy in the low-pressure mercury discharge lamp, which can be made by a one-step melting alloy method, including: The various components are mixed according to the mass ratio, heated and melted to produce indium mercury alloy or indium mercury alloy.

[0105] Among them, indium mercury alloy or indium mercury multiple alloy can be placed in the exhaust pipe, or indium mercury alloy or indium mercury multiple alloy can be poured into the lamp after exhaust, or indium mercury alloy or indium mercury multiple alloy can be melted and fixed On the inner wall of the glass tube.

[0106] The preparation method of the indium-mercury alloy or indium-mercury multi-element alloy can also be made by a step-by-step melting alloy method, including: mixing metals other than mercury in a mass ratio, placing them in a sealed cavity of a low-pressure mercury di...

Embodiment 1

[0110] Example 1: T5 (inner diameter ) Fluorescent lamp length 1.2m, power 90W, lamp current 0.8A, tube current density 0.45A / cm 2 , The indium thulium alloy sheet is fixed on the front end of the electrode. After adding mercury, an indium thulium mercury ternary alloy is formed, in which indium: mercury: thulium = 94: 3.4: 2.6, and the effective mass ratio of indium to mercury is indium: mercury = (94.0- 3.4*2.04): 2.6=97.1:2.9. The phosphor is a rare earth three-primary phosphor with high temperature resistance and low light decay, with a light efficiency of 95Lm / W. It is used in low temperature environments such as freezing workshops and has strong environmental temperature adaptability. Compared with the traditional T5-28W fluorescent lamp, it not only solves the low temperature light output and low efficiency of the lamp, but also greatly improves the light output of a single lamp. One lamp can replace the traditional three lamps and reduce the rare earth three. The amount...

Embodiment 2

[0111] Example 2: T6 (inner diameter ) Fluorescent lamp length 1.2m, power 220W, lamp current 2.0A, tube current density 0.88A / cm 2 , The indium thulium alloy sheet is fixed on the front end of the electrode, and mercury is added to form an indium thulium mercury ternary alloy, where indium: mercury: thulium = 88:2:10, and the phosphor is a high-temperature resistant, low light decay rare earth three-primary fluorescence Powder, light effect 90Lm / W.

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Abstract

The invention discloses a low-pressure mercury electric-discharge lamp. The low-pressure mercury electric-discharge lamp comprises a sealing cavity, wherein the sealing cavity contains indium-mercury alloy or indium-mercury multi-component alloy, and the mass proportion of effective indium and mercury in the indium-mercury alloy or the indium-mercury multi-component alloy is In:Hg=97.05:2.95-98.8:1.2. The low-pressure mercury electric-discharge lamp is small in size, high in lighting effect and stable in light output and can still stably control mercury vapor pressure at the temperature of higher than 170 DEG C. Correspondingly, the invention further discloses an ultraviolet disinfection and sterilization device including the low-pressure mercury electric-discharge lamp. The ultraviolet disinfection and sterilization device can still improve ultraviolet ray output and is stable in light output on the premise that the sectional area or the volume of a disinfection cavity is decreased.

Description

Technical field [0001] The invention relates to the field of discharge lamps, in particular to a low-pressure mercury discharge lamp and an ultraviolet disinfection and sterilization device using the low-pressure mercury discharge lamp. Background technique [0002] In low-pressure mercury discharge lamps, mercury vapor pressure P Hg Is proportional to the concentration of mercury atoms, with P Hg Increases, the concentration of mercury atoms increases, the chance of mercury atoms colliding with electrons increases, and the mercury atoms are excited to 6 3 P 1 The opportunity of the state is gradually increasing, and the radiation efficiency of 253.7nm is η UV It will gradually increase. However, the concentration of mercury atoms increases, except that mercury atoms are excited to 6 3 P 1 In addition to the increase in opportunities for the state of energy, the opposite effect will also be produced. The 253.7nm radiation emitted by the atom irradiates the adjacent ground state ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/72A61L9/20C02F1/32
CPCH01J61/72A61L2/10H01J61/20
Inventor 何志明
Owner 何志明
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