Air conditioning and heating unit for automotive vehicles

An air conditioning and heating unit for an automotive vehicle, comprising:

• a housing of synthetic resin material;
• a blower disposed in said housing;
• an evaporator disposed in said housing and communicating with said blower;
• a heat exchanger disposed in said housing and communicating with said blower;
• a mixing chamber having a common inlet opening for receiving hot air and cold air and a plurality of inlet openings for individual air discharge nipples for defroster level, outside level, center level and foot room level of a passenger compartment in the vehicle;
• a first air mixing flap at an inlet to the heat exchanger;
• a second air mixing flap, associated with said common inlet opening and coupled to said first air mixing flap, controlling the inflow of cold air and hot air into said mixing chamber;
• wherein said heat exchanger is disposed substantially transverse to said evaporator;
• wherein said mixing chamber is disposed above a region between said evaporator and said heat exchanger;
• wherein a discharge opening to a center level nozzle is arranged between two discharge openings to two defroster nozzles;
• and
• wherein said second air mixing flap is subdivided into three flap sections, of which a center section is arranged radially displaced with respect to two outside sections.