Air treatment apparatus and air conditioner

An air treatment apparatus comprising:

• a housing, an airflow passage being formed in the housing, a mounting cavity being formed in the airflow passage, a side of the mounting cavity having a mounting opening, a plurality of mounting portions being disposed in the mounting cavity, and two opposite sides of each of the plurality of mounting portions having a first sliding surface and a second sliding surface respectively;
• and
• at least one air treatment device,
• wherein an air treatment device of the at least one air treatment device comprises a first retaining surface and a second retaining surface arranged apart from and facing the first retaining surface, a slide groove being defined between the first retaining surface and the second retaining surface, and
• wherein the air treatment device is configured to be drawably mounted to the housing by fitting a corresponding mounting portion of the plurality of mounting portions into the slide groove between the first retaining surface and the second retaining surface of the air treatment device so that the first sliding surface is in slidable fit with the first retaining surface and the second sliding surface is in slidable fit with the second retaining surface.