Continuous air inlet and outlet inflator

The utility model relates to a continuous air inlet and outlet air cylinder which comprises a cylinder body and a pull rod which form a telescopic structure, a piston is arranged at the telescopic end of the pull rod, a hollow air inlet pipe cavity and a hollow air outlet pipe cavity are arranged at the sealed end of the cylinder body, and the two ends of the air inlet pipe cavity and the two ends of the air outlet pipe cavity are opened and communicated with the cylinder body. A first gas diaphragm one-way valve is arranged in the gas inlet pipe cavity, and a second gas diaphragm one-way valve is arranged in the gas outlet pipe cavity. The cell sap transmission device is simple in structure, light, small and exquisite, can be operated in a handheld manner, can be continuously operated without providing a placement place and a power supply and repeatedly connecting and disconnecting with the filter, has no requirements on the material and the length of a liquid medium transmission hose, is mild in the cell sa