| 摘要 |
<p>A compressor (2) for a refrigeration unit having a stator (16), a rotor (40) orbiting in engagement with the stator to cyclically open, fill with refrigerant gas from at least one inlet port (56), compress and discharge compressed refrigerant gas through at least one discharge port (54), a rotary drive (18, 48, 52) for orbiting the rotor, a driven element of a magnetic coupling in driving connection with the rotary drive, a casing (4) sealed save for the ports and enclosing all of the foregoing components, a driving element (36) of the magnetic coupling outside of the casing in close proximity to the driven element (26), and a motor (34) to rotate the driving element. Preferably the rotor is a multilobed rotor orbiting within a trochoidal chamber defined by the stator. Most preferably, a three lobed rotor is journalled on an eccentric (42) carried by a shaft (18) of the rotary drive and has a ring gear (50) driven by a gear (46) of the rotary drive having the same eccentricity as the eccentric and rotated in synchronism therewith, the gear ratio of the ring gear to the eccentric being three to one.</p> |
