Motor drive device including fan unit

A motor drive device comprising:

• a mounting member formed with a mounting hole;
• a fan unit fixed to the mounting member, the fan unit including:
• a lid disposed to face the mounting member so as to cover at least a part of the mounting hole;
• and
• a sealing member provided on a surface of the lid that faces the mounting member;
• and
• at least one restricting member attached to the lid so as to be movable with respect to the lid, the restricting member being movable between a restriction position, in which the restricting member engages the mounting member and restricts the lid from moving in a separating direction away from the mounting member, and a non-restriction position, in which the restricting member disengages from the mounting member and allows the lid to move in the separating direction,
• wherein the mounting member includes:
• a first surface facing the separating direction and extending around the mounting hole;
• and
• a second surface facing the separating direction and disposed separate away from the first surface in the separating direction,
• wherein, when the at least one restricting member is disposed at the restriction position, the surface of the lid contacts the second surface, and the sealing member is held between the surface of the lid and the first surface so as to seal a gap between the surface of the lid and the first surface.