Mechanical hysteresis type vacuum maintaining energy-saving control device

The invention discloses a mechanical hysteresis type vacuum maintaining energy-saving control device which comprises a high-pressure air source, an electromagnetic valve, a vacuum generator and a suction cup. The electromagnetic valve, the vacuum generator and the suction cup are sequentially connected with the high-pressure air source through an air pipe, and a first air valve is arranged on the air pipe between the electromagnetic valve and the vacuum generator. A one-way valve is arranged between the vacuum generator and the suction cup. A valve rod of the first air valve is connected with a piston rod of a first air cylinder, the first air cylinder is communicated with an air pipe between the one-way valve and the suction cup through an air pipe, and springs are arranged on the piston rod and the valve rod between a first air cylinder shell and a first air valve shell in a sleeved mode. By means of a mechanical mode, in the operation process, opening and closing of the air valve are controlled through air