Air conditioner for vehicle

An air conditioner for a vehicle comprising:

• a case having an air inlet, an air outlet, and an air passageway formed therein;
• a blower unit for blowing air to the air inlet;
• an evaporator and a heater core disposed in the air passageway of the case in an air flow direction in order;
• and
• a first temperature adjusting door for adjusting the degree of opening such that air passing through the evaporator selectively flows through the heater core,
• wherein the air passing through the heater core passes through a warm air channel and is guided to a floor outlet in a shortest distance to be discharged,
• wherein the air passing through the evaporator passes through a cold air channel and is guided to a first vent outlet in a shortest distance to be discharged, and
• wherein a mode door is arranged at a position where the floor outlet and the first vent outlet intersect each other to guide air and adjust the volume of the air,
• wherein the air conditioner further comprises:
• a warm air passageway forming a flow passage in such a way that the air passing through the evaporator passes through the heater core;
• a first cold air passageway making the air passing through the evaporator bypass the heater core downwardly;
• and
• a second cold air passageway making the air passing through the evaporator bypass the heater core upwardly, and
• wherein the second cold air passageway is directly communicated with the mode door and when the mode door completely closes to the first vent outlet, the second cold air passageway is communicated with the first vent outlet.