Patent ID: 8201819

Claim:
A valve device comprising: a first shielding plate movable across a fluid passage for passing a fluid therethrough, the first shielding plate including a first fluid passing hole which overlaps with the fluid passage when the first shielding plate is moving; a second shielding plate adjacent to the first shielding plate, movable across the fluid passage and including a second fluid passing hole which overlaps with the fluid passage when the second shielding plate is moving; and a driving unit comprising a first motor and a second motor, the first motor configured to rotate the first shielding plate in a first rotational direction such that the first air passing holes across the fluid passage, the second motor configured to rotate the second shielding plate in a second rotational direction opposite to the first rotational direction, and the driving unit configured to make the first and second shielding plates cooperate with each other to close and open the fluid passage.