SUCTION PORT FOR EVACUATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an evacuation device capable of increasing the degree of vacuum in a short time without requiring a large force for tightly fitting a bag. SOLUTION: Regarding a suction port for evacuating an accommodation bag 3 or an accommodation chamber accommodating a work, a suction port 1 of a vacuum pump and a suction port 2 of a suction blower are formed of a single shape jointly/separately with/from each other. The accommodation bag or the accommodation chamber is evacuated from the section port 2 of the suction blower, and when the degree of vacuum reaches a predetermined value, the suction port 1 of the vacuum pump is capable of performing the evacuation while an air passage 4 of the suction port of the suction blower to the accommodation bag or the accommodation chamber is closed.