Patent attributes
A fan motor includes a motor, an impeller and a housing. The housing includes an inner wall portion, a silencer portion, and a communicating opening. The inner wall portion extends along a rotation axis to assume a tubular shape, and houses at least a portion of the impeller therein. The silencer portion includes a portion radially outside of the inner wall portion, and defines a silencing space between the inner wall portion and the silencer portion. The communicating opening brings a space inside of the inner wall portion into communication with the silencing space. A portion of the communicating opening is defined by an end portion of the inner wall portion on an inlet side. The silencing space covers only a portion of the circumferential extent of the inner wall portion. This allows the silencing space to be arranged in a dead space around the inner wall portion.
