Fluid transfer device

摘要

The invention relates to a device using reciprocal movement of the piston to transfer fluid. The device includes a body, a switching unit, a triggering unit, a piston unit and a transmission unit, the ends of the first and second passages are configured to communicate with the manifold chamber, the first passage always communicates with the receiving chamber, the second passage configured to mate with the triggering unit with the help of the triggering end, and the reset component alternatively communicates with the input passage or the output passage; the piston reciprocally moves in the receiving chamber, the first and second belt wheels interact with each other through the engagement between the first and second gears, the device has functions of pumping water or compressing air or extracting air, it depends on the kinds of the working medium.