Box assembly and winnowing machine

The box assembly comprises an air suction box and a filter screen piece, the air suction box is provided with an air suction cavity, an air inlet and an air outlet, the air inlet and the air outlet are communicated with the air suction cavity, and the filter screen piece is detachably arranged on the air suction box and located at the air inlet. The filter screen piece is used for preventing part of materials from entering the air suction cavity through the air inlet. By means of the structure, the filter screen piece is detachably arranged on the air suction box, maintenance personnel can detach the filter screen piece and take the filter screen piece away from the diffusion chamber for cleaning, the maintenance personnel do not need to stay in the diffusion chamber for a long time, and therefore harm to the maintenance personnel can be reduced. 本实用新型公开了一种箱组件以及风选机，其中，一种箱组件包括吸气箱和滤网件，吸气箱设有吸气腔，以及与吸气腔连通的进气口和出气口，滤网件可拆卸地设于吸气箱，滤网件位于进气口处，滤网件用于阻挡部分物料通过进气口进入吸气腔。通过上述结构，滤网件可拆卸地设于吸气箱，维护人员可将滤网件拆出并带离扩散室进行清理，其中，维护人员无需长时间地逗留