Constant-pressure environment simulating chamber

Abstract

The invention relates to the technical field of environment experiments, and particularly relates to a constant-pressure environment simulating chamber. The constant-pressure environment simulating chamber comprises a chamber body and a pressure balance assembly, wherein the pressure balance assembly is positioned inside the chamber body; an air inlet and a sampling hole are formed in the chamber body; the pressure balance assembly is communicated with the air inlet. Experimental gas is loaded in the chamber body of the constant-pressure environment simulating chamber, the pressure balance assembly is placed in the chamber body and is communicated with the outside atmosphere through the air inlet. As the experiment is in progress, negative pressure is gradually formed in the chamber body when the gas in the chamber body is collected through the sampling hole, at this time, the outside air pressure is greater than the air pressure in the chamber body, the outside air is introduced into the pressure balance assembly inside the chamber body through the air inlet, and the stability of the air pressure in the chamber body is maintained, so that the concentration of the gas in the chamber body is invariable. According to the constant-pressure environment simulating chamber disclosed by the invention, the gas in the chamber body is basically and totally used for analyzing without influencing sampling volume and gas concentration; stable and uniform standard gas can be conveniently prepared; the constant-pressure environment simulating chamber disclosed by the invention can be used for carrying out a gas reaction experiment and detecting release gas of put-in objects.

Description

technical field [0001] The invention relates to the technical field of environmental experiments, in particular to a constant-pressure environmental experiment chamber. Background technique [0002] At present, for routine experiments, especially when the sampling volume is small, the use of large-volume environmental experiment chambers is not suitable and wastes resources. Therefore, small environmental chambers are generally sampled, such as 60L, 1m 3 . [0003] When a small experimental chamber is used, the sampling volume during the experiment has a great influence on the entire experimental chamber. On the one hand, as the sampling progresses, the pressure in the cabin gradually decreases, and the outside air will enter the cabin through the gap and affect the experiment; The sampling pressure of the pump needs to be increased, and the displayed value of the sampling volume is not accurate at this time. Therefore, the existing small-scale environmental experiment c...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problem that when the existing experimental cabin is sampling the gas inside, it is easy to form a negative pressure in the cabin and affect the internal gas concentration

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