Compact air conditioner for automobiles

A compact air conditioner for automobiles, comprising:

• an evaporator positioned on an upstream side of an interior flow passage of the air conditioner;
• a heater core positioned on a downstream side of said interior flow passage;
• a defrost vent selectively opened and closed by a defrost door, and positioned in a mixing chamber that is situated in an exit of said interior flow passage;
• a face vent opened and closed by a face door;
• a first partition positioned between said evaporator and said heater core, and provided with a first blowing opening for allowing air to bypass said heater core and a second blowing opening for blowing air to said heater core;
• a floor vent separated by a second partition from said heater core, and selectively opened and closed by a floor door;
• a temperature regulating door for regulating degrees of opening of said blowing openings, said temperature regulating door being movably supported by walls of a housing of said air conditioner;
• a heater chamber containing said heater core, said heater chamber being defined by said first and second partitions and a pair of side partitions, said heater chamber being open at a bottom thereof and communicating with said second blowing opening;
• and
• a pair of side blowing passages each being formed between one of said side partitions and an interior wall of said housing of said air conditioner.