Compressor unit and refrigeration device

Value F obtained by multiplying the weight of a piston (54) and a blade (57) by the square of the rotational speed of a compressor body (11), distance h from the center in the thickness direction of the piston (54) to the center of gravity (G1) of a compressor unit (10), and moment of inertia I about the center axis passing through the center of gravity (G1) of the compressor unit (10), which is the center of rotation when the compressor body (11) vibrates in a direction inclined toward the accumulator (40) side, from the accumulator (40) The distance L from the axis of the inlet pipe (42) to the center of gravity (G1) of the compressor unit (10) and the rated capacity P of the refrigeration device (1) satisfy the condition F * (h/I) * L < = 19 * P + 128. 活塞(54)及叶片(57)的重量乘以压缩机主体(11)的转速的平方所得的值F、从活塞(54)的厚度方向的中心到压缩机单元(10)的重心(G1)的距离h、绕当压缩机主体(11)朝着向储液器(40)侧倾斜的方向振动时的旋转中心即通过压缩机单元(10)的重心(G1)的中心轴的惯性力矩I、从储液器(40)的入口管(42)的轴心到压缩机单元(10)的重心(G1)的距离L、以及制冷装置1的额定能力P满足F×(h/I)×L≤19×P+128的条件。