The working principle of the portable vacuum pump is the same as that of the micro vacuum pump. It is the circular motion of the motor, and the diaphragm inside the pump is reciprocated through the mechanical device, thereby compressing and stretching the air in the fixed volume of the pump cavity to form a vacuum ( Negative pressure), a pressure difference is generated between the pump suction port and the outside atmospheric pressure. Under the action of the pressure difference, the gas is pressure (suctioned) into the pump cavity, and then discharged from the exhaust port.

It is precisely because the suction port or the exhaust port can form a pressure difference with the outside atmosphere. At the same time, unlike large vacuum pumps that require lubricating oil and vacuum pump oil, it will not pollute the working medium, and it is compact, low noise, maintenance-free, and can be continuously 24 Hourly operation and other advantages, so the miniature vacuum pump is used as a power device, widely used in gas sampling, gas circulation, vacuum adsorption, accelerated filtration, automobile vacuum assistance, etc., and has been widely used in medical, health, scientific research, environmental protection and other fields.