Gas circuit control device for reducing distortion of collected sample

The utility model belongs to the field of ship flue gas automatic monitoring systems, and particularly relates to a gas circuit control device for reducing distortion of collected samples, which comprises a shell, a human-computer interface mounted on the shell and a pneumatic control component mounted in the shell. The pneumatic control assembly comprises a sample collection device, a transmission device, pretreatment equipment and an analysis instrument, the sample collection device has coarse and fine two-stage filtering and heating functions, and the transmission device comprises a sampling pipeline, a gas path detection sensor, a flow controller and a sampling pump; the pretreatment device comprises a dehumidification condensation device, a filtering device, an execution device and a programmable controller, the analysis instrument is arranged at the rearmost end of the gas path, the programmable controller is connected with the gas path detection sensor, the execution device and the human-computer inter