Drum-type washing machine

A drum-type washing machine comprising:

• a casing having an inlet through which laundry is loadable and unloadable;
• a tub in the casing and configured such that an inside of the tub is accessible through the inlet, the tub configured to store water;
• a drum in the tub, the drum configured to rotate about an axis extending along forward and rearward directions;
• a pipe connection portion on a side surface of the tub, and configured to be connected to a pipe;
• and
• an air-flow noise reduction mechanism in the pipe connection portion, and configured to control air-flow caused by rotation of the drum, the air-flow noise reduction mechanism including:
• a plurality of partition plates spaced apart from one another with gaps therebetween, each partition plate of the plurality of partition plates extended across an opening of the pipe connection portion from a first edge of the opening to a second edge of the opening that is opposite to the first edge, or
• a partial cover plate that covers a first portion of an opening of the pipe connection portion such that a second portion of the opening of the pipe connection portion is uncovered, the first portion being one of:
• a central portion of the opening, wherein the partial cover plate is supported by a support piece extended between an edge of the opening and the partial cover plate,
• a downstream portion of the opening that extends from a downstream edge of the opening toward a middle of the opening, wherein the second portion that is uncovered includes an upstream portion that extends from an upstream edge of the opening toward the middle of the opening, or
• the upstream portion of the opening, wherein the second portion that is uncovered includes the downstream portion.