| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a multistage compressor capable of reducing a manufacturing cost of a piston, a piston ring and a bore. SOLUTION: A two-stage compressor 1 is constituted so that an outer diameter of a first piston 12 slidable in a first bore 11 and an outer diameter of a second piston 22 slidable in a second bore 21 become equal to each other. For sealing refrigerant gas of a first compression space 10 and a second compression space 20, a first piston ring 16 is installed on the outer periphery of the first piston 12, and a second piston ring 26 is installed on the outer periphery of the second piston 22 to thereby reduce kinds of respective members such as the bore, the piston and the piston ring.</p> |
