Rotary machine

A rotary machine comprising:

• a stator;
• a rotatable rotor disposed in a hollow space of the stator;
• and a housing that accommodates the stator and the rotor, wherein
• the housing includes:
• a one-side space disposed on one side in an axial direction relative to the rotor and communicating with a gap between an inner peripheral surface of the stator and an outer peripheral surface of the rotor;
• an other-side space disposed on the other side in the axial direction relative to the rotor and communicating with the gap;
• a one-side communication hole that allows outside of the housing and the one-side space to communicate with each other;
• and
• an other-side communication hole that allows the outside of the housing and the other-side space to communicate with each other,
• the one-side space and the other-side space communicate with each other via the gap,
• each of the one-side communication hole and the other-side communication hole is connected to an airflow generator that generates an airflow,
• the rotary machine includes, as the one-side communication hole, a forced inflow hole that causes air outside the housing to forcibly flow into inside of the one-side space by the airflow generator, and a natural exhaust hole through which air inside the one-side space is naturally exhausted, and
• the rotary machine includes, as the other-side communication hole, a forced exhaust hole that causes the airflow generator to forcibly exhaust air inside the other-side space, and a natural intake hole through which air outside the housing is naturally sucked into the inside of the other-side space.