Air conditioner for vehicle

An air conditioner for a vehicle comprising:

• an air conditioner casing having a defrost vent, a face vent, and a front seat floor vent formed at outlets thereof in such a manner as to communicate with a mixing chamber and be adjusted in a degree of the opening thereof by means of respective mode doors, having left and right casings joined to each other in such a manner as to be separated into left and right portions, and having a lower casing coupled to the lower portions of the left and right casings;
• an evaporator and a heater core each disposed at inside air passageways of the air conditioner casing;
• a rear seat console vent adapted to communicate with a warm air passageway having the heater core disposed therein and to communicate with a cool air passageway through a console side cool air bypass passageway disposed along the bottom surface of the air conditioner casing under the lower side of the heater core;
• a front seat temperature adjusting door adapted to adjust a degree of the opening of the outlets of the cool air passageway and the warm air passageway with respect to the mixing chamber;
• a rear seat main temperature adjusting door adapted to adjust a degree of the opening of the inlets of the warm air passageway and the console side cool air bypass passageway;
• a first rear seat auxiliary temperature adjusting door adapted to adjust a degree of the opening of the outlets of the warm air passageway and the console side cool air bypass passageway with respect to the rear seat console vent, and
• a leaky warm air discharging passageway connected in fluid flow relation between the warm air passageway and the console side cool air bypass passageway, the leaky warm air discharging passageway being connected and arranged for isolating the console side cool air bypass passageway from the warm air passageway, for discharging the warm air leaking through a left and right joining portion of the left and right casings from the warm air passageway to the outside of the air conditioner casing.