Motor-integrated fluid machine

A motor-integrated fluid machine, comprising:

• a fluid machine unit that compresses or expands fluid;
• a motor unit provided with a drive shaft connected to the fluid machine unit, a rotor integrally rotated with the drive shaft, a stator that applies torque to the rotor, and a motor casing that houses the rotor and the stator;
• a cooling fan that is connected to a reverse side to the fluid machine unit of the drive shaft, sucks cooling air from a motor unit side, and cools the motor unit and the fluid machine unit;
• and
• a fan cover that covers a part of a diametrical outside of the cooling fan and the reverse side to the motor unit,
• wherein the cooling fan discharges cooling air outside in a diametrical direction;
• and a
• minimum sectional area of a cooling air passage from the diametrical outside toward the drive shaft formed between a side of the motor casing and the fan cover opposite to the motor casing side between the motor unit and the cooling fan is larger than the minimum sectional area of a cooling air passage from the motor unit side to the cooling fan.