A dynamic gas distribution instrument and gas distribution method

Abstract

The invention relates to the field of gas detection instruments, in particular to a dynamic gas distribution instrument and a gas distribution method. The gas distribution instrument includes a raw gas passage, a dilution gas passage and a mixing pipeline, the raw gas passage and the dilution gas passage are both connected to the mixing pipeline, the raw gas passage is provided with a first flow controller, and the dilution gas passage is connected to the mixing pipeline. A second flow controller is provided on the air passage, and the second flow controller is respectively connected to the first flow controller and the mixing pipeline through a No. 1 control valve. The gas distribution device has a simple structure, good controllability, and a simple and easy gas distribution method. By using the gas distribution device, the self-cleaning and self-calibration functions of the first flow controller and the second flow controller can be realized, which improves the performance of the gas distribution device. The precision of the target gas and gas distribution efficiency, good corrosion resistance, is conducive to the maintenance of equipment, and at the same time, several kinds of feed gas access branches are connected in parallel, and the corresponding target gas can be proportioned according to different needs.

Description

technical field [0001] The invention relates to the field of gas detection instruments, in particular to a dynamic gas distribution instrument and a gas distribution method. Background technique [0002] In gas detection and analysis instruments, it is often necessary to use a gas distribution instrument to obtain standard gases of different concentrations to calibrate the instrument. The gas concentration requirement also increases accordingly. The most commonly used method on the market to obtain standard gases with different concentrations is to use the mass flow mixing method, that is, to use a dilution gas flow controller and one or more feed gas flow controllers to dilute the feed gas in proportion to obtain the target concentration . Therefore, the accuracy of the mass flow controller that determines the standard gas concentration has become a priority issue at present, and at the same time, higher expectations have been raised for the high efficiency of the ratio o...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a gas distribution device and a gas distribution method to solve the problems of complex structure, large error accumulation, low gas distribution precision, poor controllability and easy corrosion existing in the existing gas distribution device

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