| 摘要 |
The present invention relates to a double compressor, and the double compressor comprises a housing, a first rotor supported by metal bearings inside the housing, a planetary rotor provided eccentrically inside the first rotor, wherein a first suction chamber and a first compression chamber are provided against the first rotor and the inner circumference is formed with a trochoid curved surface, a plurality of first vanes provided in the outer circumference of the planetary rotor, wherein gas is first compressed in the first compression chamber when the planetary rotor revolves; a second rotor having a trochoid curved surface provided on the same axis with the first rotor inside the planetary rotor, as well as tooth-combined with a trochoid curved surface of the planetary rotor to form a second suction chamber that the first compressed gas is inhaled and a second compression chamber that the gas inhaled into the second suction chamber is compressed; a second vane provided in the outer circumference of the second rotor, wherein the gas is second compressed and discharged into the discharge passage; and a rotary axis fixed at the center portion of the second rotor for revolving the second rotor.
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