Gas sampling mechanism and gas analysis device having the same

A gas sampling mechanism comprising:

• an inlet chamber;
• a pump chamber connected to the inlet chamber;
• a pump assembly connected to the pump chamber, and configured to compress or expand air inside the pump chamber;
• an inlet valve movably arranged between the inlet chamber and the pump chamber;
• and
• an outlet valve movably arranged between the pump chamber and an external environment;
• wherein the inlet chamber defines a first opening and a second opening, the first opening communicates with the external environment, the second opening is configured to communicate with an odor molecular detector;
• the pump chamber comprises an entrance wall and an exit wall, the entrance wall comprises a first plate and a second plate spaced from the first plate, the first plate defines a first through hole, the second plate defines a second through hole, the exit wall comprises a third plate and a fourth plate spaced from the third plate, the third plate defines a third through hole, the fourth plate defines a fourth through hole, the second through hole is arranged between the first through hole and the second opening;
• the inlet valve is movably arranged between the first plate and the second plate, a first direction is defined as a direction from the first plate to the second plate, a projection of the first through hole along the first direction falls within the inlet valve, a projection of the inlet valve along the first direction falls within the second through hole;
• the outlet valve is movably arranged between the third plate and the fourth plate, a second direction is defined as a direction from the third plate to the fourth plate, a projection of the third through hole along the second direction falls within the outlet valve, a projection of the outlet valve falls within the fourth through hole.