Indoor unit and air conditioner

An indoor unit of an air conditioner, comprising:

• a heat exchanger;
• a cross-flow fan that rotates around a rotation axis;
• a housing that includes a suction port and a blowout port and that accommodates the heat exchanger and the cross-flow fan therein;
• and
• a stabilizer that separates a suction flow path and a blowout flow path of the cross-flow fan from each other, wherein
• the stabilizer includes
• a tongue portion that extends along an outer circumferential surface of the cross-flow fan and that has a facing surface facing the cross-flow fan,
• a first protrusion portion that protrudes from the facing surface toward the cross-flow fan, and
• a second protrusion portion that protrudes from the facing surface toward the cross-flow fan and that is located closer to the blowout flow path than the first protrusion portion,
• the first protrusion portion has a first rectifying surface that faces the blowout flow path and that is inclined toward the suction flow path toward a tip side of the first protrusion portion,
• the second protrusion portion has a second rectifying surface that faces the blowout flow path and that is inclined toward the suction flow path toward a tip side of the second protrusion portion,
• the first rectifying surface and the second rectifying surface are each inclined toward the suction flow path at an acute inclination angle with respect to a radial direction of the rotation axis,
• a first gap between the first protrusion portion and the cross-flow fan is smaller than a second gap between the second protrusion portion and the cross-flow fan, and
• a difference between the first gap and the second gap is 0.5% or more of a diameter of the cross-flow fan.