Technical characteristics of vacuum protection fresh keeping device

The vacuum protection fresh-keeping device is composed of an air extracting cylinder and an air extracting cap The front end of the air extraction cylinder is provided with an air nozzle integrated with it, the piston and the piston rod are connected with the air extraction cylinder body, the handle and the piston rod are integrated with each other and located outside the air extraction cylinder body; the cap body of the air extraction cap is of arch structure, and the center of the cap body is provided with an air extraction channel which is used in conjunction with the air nozzle of the air extraction cylinder, the top of the air extraction channel is provided with a hole, the top of the air extraction channel is provided with a cover, and the edge of the cap body is connected with it One piece shoulder The vacuum protection and fresh-keeping device has the advantages of simple design structure, low production cost and no power consumption When it is used, it only needs to cover the cap body on the container mouth, insert the air nozzle into the air extraction channel, and push and pull the handle to achieve the purpose of vacuum extraction, which is convenient for operation.