An air conditioning indoor unit having a Coanda effect utilization mode that utilizes the Coanda effect, which is a phenomenon where, if there is a wall surface near a flow of a gas, the gas tends to flow in a direction along the wall surface even if the direction of the flow and a direction of the wall surface are different, to guide, in a predetermined direction, a flow of outlet air blown out from an air outlet, the air conditioning indoor unit comprising:
- an indoor unit front portion disposed outside a blowing path;
- a movable first air direction adjustment plate configured to change an up and down direction of the outlet air;
- a second air direction adjustment plate disposed adjacent to the air outlet, the second air direction adjustment plate including a front end portion and an outside surface, and
- when the second air direction adjustment plate is housed in the indoor unit front portion, the front end portion is housed in the indoor unit front portion, and the outside surface is outside the blowing path;
- a control unit configured to control postures of the first air direction adjustment plate and the second air direction adjustment plate;
- and
- a scroll configured to guide air-conditioned air to the air outlet,
- in the Coanda effect utilization mode, the control unit controlling the postures of the first air direction adjustment plate and the second air direction adjustment plate in such a way that
- the second air direction adjustment plate assumes a posture in which the second air direction adjustment plate is spaced apart from the indoor unit front portion, and inside the blowing path, the outside surface is inside the blowing path, and a height position of a rear end portion of the second air direction adjustment plate is lower than when operation is stopped and
- the second air direction adjustment plate and the first air direction adjustment plate form a predetermined angle,
- when the second air direction adjustment plate and the first air direction adjustment plate form the predetermined angle, the second air direction adjustment plate and the first air direction adjustment plate generate an obliquely upward Coanda air flow along an undersurface of the second air direction adjustment plate because of the Coanda effect, and
- the predetermined angle formed by the postures of the first air direction adjustment plate and the second air adjustment plate generates the obliquely upward Coanda air flow
- the first air direction adjustment plate having an inside arcuate surface,
- the second air direction adjustment plate having an outside arcuate surface, and
- when the control unit executes the Coanda effect utilization mode, the first air direction adjustment plate and the second air direction adjustment plate assume postures that satisfy a condition where an internal angle formed by a tangent to a terminal end portion of the scroll and a tangent to a front end of the outside arcuate surface of the second air direction adjustment plate is greater than an internal angle formed by the tangent to the terminal end portion of the scroll and a tangent to a front end of the inside arcuate surface of the first air direction adjustment plate.