Integrated gas path structure for trace gas analyzer

Abstract

The invention relates to the field of trace gas analysis, aims to provide a gas path structure having simple structure and reliable gas tightness, and particularly provides the integrated gas path structure for a trace gas analyzer. The integrated gas path structure comprises a test chamber used for penetrating through an air inlet device and formed by a test chamber shell, and an air outlet device, and also comprises an electromagnetic valve accommodating chamber; a test chamber air outlet, a test chamber air inlet and the electromagnetic valve accommodating chamber are connected in sequence and are arranged on the test chamber shell. According to the integrated gas path structure for the trace gas analyzer, component and part accommodating chambers are arranged on the test chamber shell and are connected to form the integrated gas path structure through a built-in connection channel, so that gas path connection points are greatly reduced, and the air tightness and the safety of the gas analyzer are ensured.

Description

technical field [0001] The invention relates to the field of trace gas analysis, in particular to an integrated gas circuit structure for a trace gas analyzer. Background technique [0002] The working principle of the electrochemical sensor requires that it cannot be exposed to an environment with a high concentration of the measured gas for a long time, otherwise its service life will be shortened. In the prior art, the test chamber used for the gas analysis instrument includes a test chamber inlet and a test chamber gas outlet in addition to the sensor chamber inside which the sensor is installed. In order to avoid contact with the outside gas when the electrochemical sensor is not working, it is usually used to control the opening and closing of the gas circuit by adding solenoid valves at the inlet and outlet of the test chamber of the sensor test chamber. At this time, the solenoid valve coil will not be energized, and the closing part of the solenoid valve will be cl...

AI Technical Summary

Problems solved by technology

[0003] It is necessary to add two solenoid valves inside the instrument. When the solenoid valve is connected to the sensor test chamber through the gas path, the connection point of the gas path is added, which is prone to air leakage during operation, so that the measurement is inaccurate, resulting in a lot of rework

[0004] 1. This structure occupies a large space, and the difficulty of assembly increases. It is extremely inconvenient to install and replace the sensor. It requires a lot of tools and even professionals to complete it. The maintenance period is long and the cost is high.

[0005] 2. With this structure, the sensor is often located at a lower position in the gas path, and the water vapor in the gas condenses and accumulates in the test chamber, which will soak the sensor in water and damage the sensor

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