Abstract: An improved film type air temperature control valve for an automotive HVAC assembly has a flexible, apertured belt that wraps closely around both faces of a heater core case internal to the HVAC housing. Winding and unwinding of the belt around the heater core case, and across a heater core bypass passage, simultaneously opens up more of the bypass passage as it closes off more of the heater core faces, and vice versa. Because of the close conformance of the belt to and across the heater core faces, both faces of the always hot heater core can be completely closed to direct or indirect air flow, preventing any undesired incidental heating of the air flow.

Abstract: A film valve designed to replace a semi cylindrical, solid rotary valve, which rolls the film against or away from the perimeter seal of an HVAC outlet opening without relative rubbing. Spring biased take up rollers journaled on V shaped, resilient wire support legs keep a film sheet biased against interleaved, arcuate support fingers to hold the film in the necessary curved shape. The curved film sheet rolls up or winds out from the rollers as the legs are pushed toward one another, or allowed to swing away from one another. The film rolls down onto or up and off of the foam seal surrounding the outlet opening without relative rubbing.

Abstract: An air inlet assembly for the scroll housing of an automotive air conditioning and ventilation system is specially structurally matched to the scroll housing so as to be more compact and efficient. An inlet housing is fashioned coaxial to the scroll housing and blower, within which a coaxial, partially cylindrical door rotates around the central axis so as to open or close one of a pair of diametrically opposed air openings. An annular filter fits within the rotating door. Regardless of which air inlet is open, air that is pulled in by the blower is forced into a radial space between the filter and the door, three hundred and sixty degrees around, and is forced radially through the filter before entering the scroll housing. Because of the coaxial, matching relationship between inlet housing a scroll housing, the entire assembly is very compact and low in profile, as measured along the vertical co axis.