Patent ID: 6772833
Filing Date: 2004-08-10
Classification: B60H,B63J

Abstract:
An automotive HVAC unit comprising:a housing defining a first outlet adapted to connect to HVAC ductwork to provide conditioned air to a first temperature zone, a second outlet adapted to connect to HVAC ductwork to provide conditioned air to a second temperature zone, a third outlet adapted to connect to HVAC ductwork to provide conditioned air to a third temperature zone, and a fourth rear outlet adapted to connect to HVAC ductwork to provide conditioned air to a fourth temperature zone within the vehicle; an evaporator adapted to cool air passing therethrough; a heater core adapted to heat air passing therethrough; a blower adapted to force air through said evaporator and said heater core; a modular insert mounted within said housing and being adapted to control the flow of conditioned air to said first, second, third and fourth outlets, said modular insert including a first blending chamber adapted to receive air from said heater core and said evaporator and to deliver blended air to said first outlet and a second blending chamber adapted to receive air from said heater core and said evaporator and to deliver blended air to said second outlet, and a first blend door for selectively controlling the proportions of air from the heater core and air from the evaporator flowing into said first blending chamber, and a second blend door for selectively controlling the proportion of air from the heater core to air from the evaporator that enters said second blending chamber.