Quantitative gas mixing and speed-controlled delivery method and device based on water-gas replacement technology

Abstract

The invention relates to a static gas distribution method and an applicable device thereof, in particular to a method and device for quantitative preparation and speed-controlled delivery of mixed gas based on water-gas replacement technology. It comprises a rigid water storage container 3 with a sealed top cover 1 (marking numbers in the accompanying drawings, the same below) and a lower mouth 5, the top cover is equipped with a vent pipe 2, and a soft container 4 positioned in the water storage container is installed in the vent. On the trachea 2, the vent pipe 2 is used for the air intake or air delivery of the soft container, and the lower mouth 5 is used for water discharge or water injection of the container. The present invention utilizes the principle of releasing or injecting a certain volume of water 6 from the rigid water storage container under the condition of maintaining air pressure balance and temperature stability, and then an equal volume of gas enters or outputs the soft container, and realizes the preparation of mixed gas and delivery. The invention maintains the advantages of the static volume gas distribution method of the soft container, and also has the advantages of high component gas concentration accuracy, greater gas preparation volume, and continuous speed-controlled delivery of gas.

Description

technical field [0001] The invention relates to a static gas distribution method and an applicable device thereof, in particular to a method and device for quantitative preparation and speed-controlled delivery of mixed gas based on water-gas replacement technology. Background technique [0002] Mixed gas preparation methods are divided into two categories: static method and dynamic method, and each category includes several gas distribution methods. According to the national standard GB / T10248-2005 (equivalent to ISO1664:2003), the static volume method can be used for mixtures containing more than one calibration component in the equilibrium gas. Many laboratories often need a small amount of mixed gas with different component concentrations ready to use, and some experiments require the mixed gas to be delivered continuously or intermittently at a certain flow rate, such as the gas supply in cell culture vessels or their storage containers. It is recognized that the stati...

AI Technical Summary

Problems solved by technology

However, at present, soft containers are used for gas mixing, and the raw material gas is generally injected into the container with a syringe. There are problems such as the airtightness of the syringe, the accuracy of the injection volume, and the limitation of the injection volume at one time.

Moreover, there is no solution for the continuous or intermittent delivery and speed control of the gas provided in the flexible container.

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