Lake water-gas interface carbon dioxide exchange capacity measuring device

The utility model relates to a lake water-gas interface carbon dioxide exchange capacity measuring device and belongs to the technical field of carbon flux measurement, the measuring device comprises a gas exchange mechanism and a sampling module, the gas exchange mechanism comprises a measuring box, the measuring box is connected with a box body positioning plate, and the sampling module is connected with the box body positioning plate. The measuring box body is provided with a box body positioning plate, the two sides of the box body positioning plate are provided with first lead screw nuts, the first lead screw nuts are arranged on the two sides of the measuring box body, the bottom of the measuring box body is provided with a gas exchange chamber, and the top of the gas exchange chamber is provided with a miniature fan. The sampling module comprises a box body frame, a second screw rod is mounted on the box body frame, the second screw rod is connected with a piston, the piston is mounted in a sampling bo