Diaphragm type wind tunnel special gas inflation method utilizing compressed air power

The invention discloses a diaphragm type wind tunnel special gas inflation method utilizing compressed air power. A device used in the inflation method comprises a diaphragm type gas storage tank, wherein a diaphragm in the middle of the diaphragm type gas storage tank divides the diaphragm type gas storage tank into an air cavity and a special gas cavity. During inflation, the special gas cavity is connected with a fixed gas storage tank of the wind tunnel, the air cavity is connected with a high-pressure gas source of the wind tunnel, stop valves of the air cavity and the special gas cavity are opened, air of the high-pressure gas source always keeps high pressure, the diaphragm slowly presses all special gas into the fixed gas storage tank, after inflation is completed, the stop valve of the special gas cavity is closed, the stop valve of the air cavity is opened, the high-pressure air in the air cavity is emptied, the high-pressure air cannot generate any pollution gas, and the inflation efficiency of the