ROOFTOP TYPE HVAC SYSTEM FOR VEHICLE

An overhead air conditioner for a vehicle is provided to improve heating/cooling efficiency by connecting three temperature regulating dampers each others and guiding air flow accurately. An overhead air conditioner for a vehicle comprises a case(100), an evaporator(200), a heater(300), left and right temperature regulating dampers(610,620), a central temperature regulating damper(630), a direction changing damper(500), and a case cover. The case has an air suction unit(110), an air outlet(120), and first and second air ducts(130,140). The air is sucked into the air suction unit by a blower(400). The air outlet is connected to a defroster duct(120b) and a ventilator duct(120a), and discharges air. The first air duct is formed in the case between the evaporator and the air outlet. The second air duct is formed between the heater and a middle part of the first air duct. The air passing through the first and second air ducts is mixed in an air mixing unit(150) and discharged to the air outlet. The left, right, central temperature regulating dampers are connected to each others.