Indoor unit of air conditioner and rotary connecting structure of indoor unit

The invention relates to technical field of air conditioners, and provides an indoor unit of an air conditioner and a rotary connecting structure of the indoor unit. The rotary connecting structure comprises a fixed part and a rotary part which rotates relative to the fixed part within a preset working angle range, wherein a rotary shaft slot, a mounting slot and a limiting slot are formed in thefixed part; the rotary part comprises a main body, a limiting part, a rotary shaft which is connected onto the main body and a head part which is connected onto the rotary shaft; the head part passesthrough the mounting slot and the rotary shaft slides into the rotary shaft slot form the mounting slot; the rotary shaft can rotate in the rotary shaft slot; the head part is blocked outside the rotary shaft slot; the head part and the main body are positioned at the opposite two sides of the fixed part; when the rotary shaft slides to the rotary shaft slot from the mounting slot, the limiting part generates elastic deformation, elastic deformation is recovered when the rotary shaft slides into the rotary shaft slot, and the limiting part is limited into the limiting slot; and the sliding range, in the limiting slot, of the limiting part comprises a preset working angle range of the rotary part. The rotary connecting structure is convenient in dismounting, can be repeatedly dismounted, isnot liable to damage, and facilities later-stage maintenance.