Air conditioner

An air conditioner comprising:

• a housing that defines an air inlet and an air outlet disposed vertically below the air inlet;
• a heat exchanger configured to exchange heat with air introduced into the housing through the air inlet;
• a blowing fan that is disposed inside the housing, that is disposed at an upper rear side of the air outlet, and that is configured to rotate about a rotational axis that extends in a left-right direction of the housing to cause air introduced through the air inlet to flow toward the air outlet;
• a lower guide configured to guide, toward the air outlet, air discharged to a rear side of the blowing fan and a lower side of the blowing fan;
• and
• an upper guide that is disposed above the lower guide and that defines a discharge flow path with the lower guide, the discharge flow path extending from the blowing fan to the air outlet,
• wherein a cross sectional area of the discharge flow path increases toward the air outlet,
• wherein the upper guide comprises:
• an upper guide-straight surface portion that defines a planar surface at an upstream side of the discharge flow path,
• an upper guide-curved surface portion that extends from the upper guide-straight surface portion toward the air outlet and that defines a curved surface of the upper guide convex toward the air outlet,
• an upper guide-upper end that extends along an outer circumferential surface of the blowing fan,
• a connecting portion that connects the upper guide-straight surface portion to the upper guide-upper end,
• a plurality of protrusions that are disposed at the upstream side of the discharge flow path, that protrude from a surface of the upper guide toward the discharge flow path, and that are spaced apart from each other along a direction parallel to the rotational axis of the blowing fan, and
• a plurality of grooves that are recessed inward from the upper guide-straight surface portion and extend along the discharge flow path, and
• wherein the plurality of grooves are spaced apart from the plurality of protrusions in a direction parallel to the discharge flow path and disposed downstream relative to the plurality of protrusions along the discharge flow path.