Compressor unit and refrigeration apparatus with reduced vibrations

A compressor unit comprising:

• a compressor body including a compression mechanism and a drive mechanism configured to drive the compression mechanism;
• and
• an accumulator connected to the compressor body,
• the compression mechanism including
• a cylinder,
• a piston configured to rotate eccentrically in the cylinder, and
• a blade partitioning an interior of a compression chamber of the cylinder into a low-pressure chamber and a high-pressure chamber,
• the drive mechanism including a drive shaft and a motor configured to rotate the drive shaft,
• a frequency that is one time an operation frequency n of the motor of the compressor body and a frequency that is three times the operation frequency n of the motor of the compressor body being a 1n frequency and a 3n frequency, respectively,
• a phase difference θ between a vibration transmission phase of the 1n frequency transferred to the accumulator from the compressor body and a vibration transmission phase of the 3n frequency transferred to the accumulator from the compressor body being −20°≥θ≥−60° with respect to a position shifted by 11° or more and 19° or less to a phase lead side from a peak of the 1n frequency where the phase lag is positive, at a maximum number of revolutions of the motor of the compressor body.