Sleeping tool position detection method and device based on radar equipment and air conditioner indoor unit

The invention discloses a sleeping tool position detection method and device and an air conditioner indoor unit. The sleeping tool position detection method comprises the steps that a sleeping time period and an action frequency threshold value are set, and the action frequency of a person is detected in the sleeping time period; comparing the action frequency with an action frequency threshold; when the action frequency is smaller than the action frequency threshold value, the actual sleep time period is judged; at the moment, the activity range of people in the room is detected, and the center position of the activity range is set as an activity coordinate (x, y); the increments of the coordinates of the four corners of the sleeping tool relative to the movable coordinates are set to be delta x1, delta y1, delta x2 and delta y2 respectively; the coordinates of the four corners of the sleeping tool are A (x + deltax1, y + deltay1), B (x + deltax1, y + deltay2), C (x + deltax2, y + deltay2) and D (x + deltax2