Automatic cleaning and zeroing system for light ion organic volatile gas detector

Abstract

The invention discloses an automatic cleaning and zeroing system for a light ion organic volatile gas detector. The automatic cleaning and zeroing system comprises a gas pump arranged on a mounting plate, an ion chamber, an ion lamp arranged in the ion chamber, an air filter, an electromagnetic valve arranged on the mounting plate and a micro processor, wherein the electromagnetic valve is a three-way electromagnetic valve and comprises a to-be-detected sample gas sampling channel, a filtered clean air sampling channel and gas output channels; the air filter consists of a VOC sampling filter and an in-site cleaning zeroing filter; and the VOC sampling filter and the in-site cleaning zeroing filter respectively corresponds to each gas output channel. By the automatic cleaning and zeroing system for the light ion organic volatile gas detector, impurities which are positioned in the ion chamber and are attached to a light outlet of an ultraviolet lamp can be automatically cleaned; and the inconvenience of manual clearing by dismounting the detector is avoided. The detector can automatically and regularly calibrate a zero point. After running for a long time in a maintenance-free manner, the detector can still keep the accuracy of a detection result and is very intelligent.

Description

technical field [0001] The invention relates to the field of high-precision intelligent instruments and meters, and more specifically, relates to an automatic cleaning of a photoion organic volatile gas detector including an air pump installed on a mounting plate, an ion chamber and an ion lamp installed in the ion chamber and zeroing system. Background technique [0002] At present, photoion organic volatile gas detector products on the market generally use pumping to extract sample gas for detection. After long-term continuous operation in the harsh field environment, the relevant components in the ion chamber, one of the main components of the photoion organic volatile gas sensor, are easily adsorbed by impurities in the field atmosphere, especially those that emit ultraviolet light to ionize organic volatiles Once the light outlet of the ultraviolet lamp is absorbed by impurities, the ultraviolet light will be blocked, resulting in a sharp drop in the sensitivity of the...

AI Technical Summary

Problems solved by technology

After long-term continuous operation in the harsh field environment, the relevant components in the ion chamber, one of the main components of the photoion organic volatile gas sensor, are easily adsorbed by impurities in the field atmosphere, especially those that emit ultraviolet light to ionize organic volatiles Once the light outlet of the ultraviolet lamp is absorbed by impurities, the ultraviolet light will be blocked, resulting in a sharp drop in the sensitivity of the sensor, which greatly affects the detection accuracy of the detector

Regularly dismantling the instrument to remove dirt manually is one of the solutions to this problem, but in practical applications, it is very inconvenient to disassemble and maintain on site

In addition, the zero point drift caused by the aging of components in the sensor or other uncontrollable factors will also affect the accuracy of the detection results of the detector.

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