Vacuum can

The utility model discloses a vacuum can, including controller, connector, check valve the cylindrical vacuum can jar body, fixed bolster, the vacuum can jar body is equipped with air inlet, ultrasonic bonding ring, check valve seal port, controller interface, air inlet, check valve seal port, controller interface locate vacuum can jar body one end, the check valve seal port sets up in vacuum can jar body one end centre of a circle position, air inlet, controller interface symmetry are located and are used on the circumference of the vacuum can jar body one end centre of a circle as the centre of a circle, the controller is connected with controller interface, the connector is connected with the controller, the check valve is connected with the check valve seal port, the fixed bolster is fixed with vacuum can jar side face. The utility model discloses can practice thrift a lot of costs, product simplification itself more can the specified performance, and there is not the problem of rustting in vacuum can inn