Vehicle air conditioner

A vehicle air conditioner comprising:

• an air-conditioning case;
• a positive temperature coefficient (PTC) heater located inside the air-conditioning case;
• a partition wall partitioning an area of a rear end of the PTC heater;
• a first door unit located on one side of the partition wall;
• a second door unit adjacent to the first door unit, the second door unit being located on another side of the partition wall;
• and
• a controller,
• wherein the PTC heater includes
• a first heater zone located in a first area facing an upper end of the first door unit,
• a second heater zone located in a second area facing a lower end of the first door unit,
• a third heater zone located in a third area facing an upper end of the second door unit, and
• a fourth heater zone located in a fourth area facing a lower end of the second door unit, and
• wherein the controller is configured to
• control an opening degree of each of the first door unit and the second door unit so as to follow a set temperature in each of the first to fourth areas, and
• independently drive each of the first to fourth heater zones in response to the opening degree.