1. The external suction vacuum packaging machine is placed into the bag through the suction nozzle for vacuuming. After vacuuming, the suction nozzle exits and then seals; The vacuum packing machine is directly placed in the vacuum chamber for vacuum sealing. In contrast, the vacuuming degree of the inner vacuuming packing machine is better than the outer vacuuming packing machine.

2. Package the product. External suction vacuum packaging machine is mainly used in electronic products or large packaging products, such as rice, etc.. Internal vacuum packaging machine is mainly used for food packaging, vacuum requirements are relatively high.

3. Scope of application. External pumping vacuum packaging machine does not require a very high vacuum degree, but the requirements of packaging products not only anti-impact, but also beautiful appearance; The important role of suction vacuum packaging machine is to remove oxygen and prevent the growth and reproduction of microorganisms, requiring high vacuum degree.

4. The external pumping vacuum packaging machine should be connected to the air source when used, and the internal pumping vacuum packaging machine is not needed, directly connected to the power supply can be, pay attention to the internal pumping vacuum packaging machine power line, because there are two phases, there are three phases.

5. Vacuumizing time, the general vacuumizing time of the internal vacuumizing packaging machine is relatively fast, the vacuumizing time of the second external vacuuming packaging machine is relatively slow, and the vacuum efficiency is low.

The second thing they have in common is:

1. Same as vacuum packaging system. Their vacuum system is vacuum pump, vacuum gauge and vacuum solenoid valve components.

2. Workflow. The main working process of vacuum packing machine is vacuuming, heat sealing, air return and circulation.