Gas-liquid path system for sucking sheet and dripping glue of sheet covering machine and control method of gas-liquid path system

The invention relates to a gas-liquid path system for sheet suction and glue dripping of a sheet covering machine and a control method thereof, and belongs to the technical field of medical instruments, the system comprises a gas path system and a liquid path system, and the gas path system is provided with a vacuum pump, a vacuum gas tank, a pressure gauge, an electromagnetic valve, a flowmeter, a filter, a suction cup and the like; the liquid path system is provided with a hydraulic pump, a glue bottle, a backflow glue bottle, a glue dripping needle, a viscometer, a flow meter, a filter, an electromagnetic valve and the like. According to the system, the vacuum gas tank is used for providing negative pressure, the vacuum pump works intermittently, operation noise is reduced, and energy is saved; residual glue liquid in the glue dripping needle is sucked back through negative pressure of the backflow glue bottle, and the phenomenon that the glue dripping needle leaks and drips liquid under the condition that