Air conditioner having air filter

An air conditioner comprising an indoor unit having at least an indoor-side heat exchanger and an outdoor unit having at least an outdoor-side heat exchanger, said air conditioner implementing a refrigeration cycle with a compressor, the indoor-side heat exchanger (120), an expansion device and the outdoor-side heat exchanger, the improvement wherein said indoor unit comprises:

• an air suction port for sucking air to be air-conditioned;
• an air blow-out port (106) for discharging the air-conditioned air;
• an air blowing unit (121) defining an air flow path along which the air supplied from said air suction port is discharged from said air blow-out port after being heated or cooled in said indoor-side heat exchanger;
• an air filter (123) detachably disposed in said indoor unit between said air suction port and said indoor-side heat exchanger in said air flow path, and comprising a frame body (132) and a filter mesh (133) secured to said frame body, wherein a bottom of said frame body has a widened portion (140) which is wider than other portions thereof, and an outwardly extending support post (130) formed at the widened portion of said frame body such that said outwardly extending support post is not located at a joint portion (139) between said frame body and said filter mesh, and disposed at an edge of said air suction port when said air filter is disposed in said indoor unit;
• and
• an engaging member engageable with said support post of said air filter frame body to fixedly secure said air filter to said indoor unit, wherein the upper portion of the indoor-side heat exchanger is bent toward the air blowing unit.