| 摘要 |
An apparatus for compressing fluid comprises: a cylinder block including a cylinder bore with a predetermined diameter penetrating the cylinder block in a lengthwise direction, at least one fluid suction port penetrating in a direction intersecting with the cylinder bore, and at least a pair of fluid discharge ports preferably of a slot shape and having one opening formed at both end portions of the cylinder bore; a piston for reciprocally moving within the cylinder bore; a discharge valve assembly movably disposed at the cylinder bore in order 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; and a cylinder head for forming a discharge chamber communicating with the fluid discharge ports by a connection to the cylinder block, and the cylinder head having a fluid discharge passage of the discharge chamber. The fluid is drawn as the fluid suction port is selectively opened by the piston reciprocally moving in the cylinder bore and 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 thereby improving the efficiency of the compressor. The structure of the compressor is simpler since a separate suction valve is not needed. Moreover, the compressed fluid is fully discharged, and a clearance volume in a conventional cylinder bore can be eliminated or minimized.
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