The vacuum pump extracts gas from the container being pumped through different mechanisms, thereby creating and maintaining a vacuum state in the space. According to the different working principles, vacuum pumps are mainly divided into two categories: gas capture pumps and gas transfer pumps. Gas capture pumps mainly capture gas molecules through physical or chemical means, such as molecular sieve adsorption vacuum pumps; Gas transfer pumps, on the other hand, transmit gas from one location to another through mechanical movements such as rotation and reciprocating motion, such as reciprocating vacuum pumps and turbine vacuum pumps.