Vent system for a self-contained air conditioner

In a self-contained air conditioning unit, including a housing, a partition within said housing dividing said housing into interior and exterior chambers;

• a condenser disposed within said exterior chamber adjacent an outlet in said casing and said evaporator being disposed in said interior chamber;
• a condenser shroud member including an opening forming a condenser compartment;
• a fan in said opening to pass exterior air between an inlet in said housing through said condenser to said outlet and for compressing air in said condenser compartment;
• a second fan in said interior chamber to recirculate interior air through said evaporator, the improvement comprising:
• a duct providing a first passageway extending between an opening in said condenser shroud and an opening in said partition, pressure of air in said condenser compartment being sufficient to force a portion of exterior air through said first passageway into the interior evaporator chamber wherein said second fan moves said portion of exterior air through said evaporator with said recirculating interior air;
• said duct being provided with first and second openings arranged to provide a second passageway for an air flow path transversely through said duct between said inlet and said opening in said shroud member;
• air directional control means associated with said duct including air valve means movably arranged relative to said passageways for alternatively permitting air flow through said first or second passageway.