Ionization device of self-cleaning two-dimensional flow type structure used for gas detection

A gas detection and self-cleaning technology, which is applied in the field of ionization chambers, can solve the problems of inconvenient repeated use, inability to see objects clearly, and great influence of water vapor, so as to achieve convenient repeated use, reduce the interference of detection work, and reduce the impact of water vapor. Effect of vapor influence reduction

Inactive Publication Date: 2015-11-18
ANHUI JOYFULL INFORMATION SCI & TECH
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Problems solved by technology

[0004] (1) Inconvenient for repeated use: Because the propagation direction of ultraviolet light is parallel to the flow direction of gas in the ionization chamber, the gas to be tested is easy to remain in the ionization chamber when it flows through the ionization chamber, and some pollutants are also lost during the flow of the gas to be measured. It is brought into the ionization chamber and accumulated on the surface of the lamp. Therefore, after using the PID to detect the gas to be tested, the remaining gas to be tested and residual substances must be thoroughly removed before it can be used for secondary use. The PID with this structure is in the Frequent and repeated cleaning work during use is inevitable
[0005] (2) Water vapor has a great influence: PID will have a certain amount of water vapor in various operating environments, and in the process of ultraviolet lamp irradiation, water vapor will absorb part of the ultraviolet light, just like driving in a foggy day. Moisture in the air absorbs the same light as the headlights of a car, making it impossible for the driver to see distant objects in the illuminated area even when the headlights are turned on

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  • Ionization device of self-cleaning two-dimensional flow type structure used for gas detection
  • Ionization device of self-cleaning two-dimensional flow type structure used for gas detection

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Embodiment Construction

[0013] refer to figure 2 , a self-cleaning two-dimensional flow structure ionization device for gas detection, characterized in that it includes an ionization chamber 1 and an ultraviolet lamp 2, the ionization chamber 1 is connected to the ultraviolet lamp 2, and the propagation direction of the ultraviolet light emitted by the ultraviolet lamp 2 is in the same direction as the gas The included angle formed by the flow directions in the ionization chamber 1 is 90°.

[0014] In the present invention, a vacuum electrodeless ultraviolet lamp with very high radiation energy of ultraviolet light waves is used to effectively solve the problem of accumulation of impurities on the surface of the lamp. Because these high-energy ultraviolet light photons can interact with pollutants on the mirror surface, the photons The energy is high enough to cut off the covalent bonds in pollutant molecules, so that organic molecules can be activated. Hydrocarbons have a strong ability to absorb u...

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Abstract

The invention relates to the technical field of ionization chambers, specifically to an ionization device of a self-cleaning two-dimensional flow type structure used for gas detection. The ionization device is characterized in that the device includes an ionization chamber and an ultraviolet lamp which are connected, and an included angle between a propagation direction of ultraviolet light emitted by the ultraviolet lamp and a flow direction in the ionization chamber is 90 degrees. The ionization device provided by the invention has the characteristics that repeated use is convenient, and vapor influence is reduced.

Description

technical field [0001] The invention relates to the technical field of ionization chambers, in particular to a self-cleaning two-dimensional flow structure ionization device for gas detection. Background technique [0002] The ionization chamber is the core part of the gas detection PID. Looking at the entire development process of the PID, it is actually a process of continuous updating and optimization of the ionization chamber. The structure of the ionization chamber directly affects the external volume and detection efficiency of the PID. Therefore, it is necessary to adopt a design Reasonable ionization chamber structure. [0003] During the development of the PID ionization chamber, the structure of the ionization chamber is often called AxialFlow (axial flow) structure, such as figure 1 shown. The outer shape of the AxialFlow structure is cylindrical, the inside is the positive electrode, and the outside is the negative electrode. o Angle, but in the actual applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J47/02
Inventor 朱卫国叶剑鸣印金汝
Owner ANHUI JOYFULL INFORMATION SCI & TECH
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