Apparatus for compressing fluid

摘要

An apparatus for compressing fluid comprises a cylinder bore longitudinally penetrating a cylinder block a suction port penetrating to the cylinder bore, and a pair of slot-shaped fluid discharge having one opening at an end portion of the cylinder bore; a piston; a discharge valve assembly movably disposed at the cylinder bore to selectively open and close the fluid discharge ports of the cylinder block, the discharge valve assembly including a valve piston having a flange for limiting movement of the discharge valve assembly; a cylinder head defining a discharge chamber communicating with the fluid discharge ports, the cylinder head having a fluid discharge passage from the discharge chamber. The fluid suction port is selectively opened by the piston reciprocally moving in the cylinder bore to draw in fluid, which is discharged through the fluid discharge ports opened by the movement of the valve piston as the pressure of the fluid in the cylinder bore increases beyond a predetermined threshold. The compressed fluid is fully discharged, and clearance volume can be eliminated or minimized.