THREE-STAGE COMPRESSOR

PURPOSE:To increase gas compression efficiency by housing a mono-piston block having the first to third piston planes within a cylinder block having the first to third cylinder planes, and enabling the compression of gas in three stages with the reciprocating motion of the piston block. CONSTITUTION:A piston block 32 having the first to third piston planes 51 to 53 for forming the first to third compression chambers 41 to 43 together with cylinder planes 35 to 37, is housed within a cylinder block 31 having the aforesaid planes planes 35 to 37. In addition, when the piston block 32 is raised within the cylinder block 31, air in the first compression chamber 41 is compressed and fed to the second compression chamber 42 through an exhaust valve 93, a cooling machine 94 and an intake valve 95. Concurrently, air within the third compression chamber 43 is compressed and discharged through a pipe line 102 and an exhaust valve 101. Then, when the piston block 34 is in downward stroke, air compressed in the sec ond compression chamber 42 is fed to the third compression chamber 43. According to the aforesaid construction, three stage air compression is carried out.