Compressor unit

A compressor unit comprising:

• a compressor, the compressor including
• a first casing that is vertically elongated,
• an electric motor housed in the first casing,
• a drive shaft driven by the electric motor, and
• a compression mechanism configured to compress a fluid;
• and
• an accumulator adjacent to the compressor, the accumulator including a second casing that is vertically elongated, and
• in a frequency range between a frequency having a value three times larger than a maximum rotation speed of the compressor and a frequency 1.25 times greater than the frequency having a value three times larger than the maximum rotation speed of the compressor when a first part is vibrated, an index showing a frequency response function of the second casing in a circumferential direction in a second part is 1.0 m/s2/N or less, where
• the first part is a part of an upper part of a side surface of the first casing and is orthogonal to an alignment direction of the compressor and the accumulator, and
• the second part is a part of an upper part of a side surface of the second casing and is opposed to a part facing the first casing.