Electric compressor device

An electric compressor device comprising:

• a rotating shaft;
• a compressor wheel provided on the rotating shaft;
• a motor for driving the rotating shaft;
• and
• a motor housing accommodating the motor,
• wherein the motor includes
• a rotor fixed to the rotating shaft, and
• a stator that is disposed around the rotor and that is supported by the motor housing,
• in the motor housing, a cooling flow channel for causing a cooling liquid to flow along a circumferential direction is formed on an outer side in a radial direction with respect to the stator,
• in a view along the circumferential direction, a length of the cooling flow channel in an axial direction is larger than a length of the cooling flow channel in the radial direction by a factor of two or more, and
• at least one rib that protrudes to the outer side in the radial direction from an inner radially side wall surface of a wall surface of the motor housing defining the cooling flow channel and that extends in the circumferential direction is provided.