Abstract: A heating, ventilation and air conditioning system includes a case having a face outlet and a foot outlet. A door is movable between a first position closing the face outlet and opening the foot outlet and a second position opening the face outlet and closing the foot outlet. A bypass passage allows air flow around the door when the door is in the second position to allow a specified amount of air flow to the foot outlet when the door closes the foot outlet.

Abstract: A fresh air and recirculation air switching case using a rotary door, since an introduced air flows along an inner surface of a circumferential wall of the rotary door, a convex grid is formed on an inner surface of the circumferential wall of the rotary door. In this system, the air flow directed toward a suction inlet is prevented from becoming turbulent behind the rotary door and the air flow noise can be suppressed.

Abstract: A heating, ventilation and air conditioning system includes a blower unit that has a first interior air intake, a second interior air intake and an exterior air intake. Three doors are moved between open and closed positions to define a recirculation mode, a fresh mode and a partial recirculation mode. As the doors move between their open and closed positions, a variable partial mode and a variable fresh mode are defined.

Abstract: A centrifugal blower assembly including a ring-shaped planar portion and a sloped guide surface. The ring-shaped planar portion defines a central aperture at which a centrifugal fan is seated. The ring-shaped planar portion is elevated relative to a lower surface of a scroll casing. The sloped guide surface is between the ring-shaped planar portion and the lower surface of the scroll casing. The sloped guide surface slopes towards the lower surface, and extends in a downstream direction towards a partition of the scroll casing at a scroll starting position of the scroll casing.

Abstract: A heating, ventilation and air conditioning system includes a blower unit that has an interior air intake and an exterior air intake. Three doors are moved between open and closed positions to define a recirculation mode, a fresh mode and a partial recirculation mode. As the doors move between their open and closed positions, a variable partial mode and a variable fresh mode are defined.

Abstract: An airflow deflector including a plurality of spaced apart ribs each extending in a longitudinal direction between a first end and a second end thereof that is generally perpendicular to an airflow stream to be deflected by the airflow deflector such that the plurality of spaced apart ribs induce recirculations of the airflow stream between neighboring ones of the plurality of spaced apart ribs to increase air pressure at an entrance to areas defined between neighboring ribs and restrict the airflow from flowing past the plurality of spaced apart ribs.

Abstract: A vehicle heating, ventilation, and air cooling (HVAC) system that includes a casing, an evaporator, and a heater core. The casing defines a windshield outlet, a side window outlet, a front face outlet, and a front foot outlet. The evaporator and heater core are both housed within the casing. The side window outlet is between the evaporator and the windshield outlet.

Abstract: A centrifugal blower assembly including a ring-shaped planar portion and a sloped guide surface. The ring-shaped planar portion defines a central aperture at which a centrifugal fan is seated. The ring-shaped planar portion is elevated relative to a lower surface of a scroll casing. The sloped guide surface is between the ring-shaped planar portion and the lower surface of the scroll casing. The sloped guide surface slopes towards the lower surface, and extends in a downstream direction towards a partition of the scroll casing at a scroll starting position of the scroll casing.

Abstract: A fresh air and recirculation air switching case using a rotary door, since an introduced air flows along an inner surface of a circumferential wall of the rotary door, a convex grid is formed on an inner surface of the circumferential wall of the rotary door. In this system, the air flow directed toward a suction inlet is prevented from becoming turbulent behind the rotary door and the air flow noise can be suppressed.

Abstract: An airflow deflector including a plurality of spaced apart ribs each extending in a longitudinal direction between a first end and a second end thereof that is generally perpendicular to an airflow stream to be deflected by the airflow deflector such that the plurality of spaced apart ribs induce recirculations of the airflow stream between neighboring ones of the plurality of spaced apart ribs to increase air pressure at an entrance to areas defined between neighboring ribs and restrict the airflow from flowing past the plurality of spaced apart ribs.

Abstract: A vehicle heating, ventilation, and air cooling (HVAC) system that includes a casing, an evaporator, and a heater core. The casing defines a windshield outlet, a side window outlet, a front face outlet, and a front foot outlet. The evaporator and heater core are both housed within the casing. The side window outlet is between the evaporator and the windshield outlet.

Abstract: A heating, ventilation and air conditioning system includes a case having a face outlet and a foot outlet. A door is movable between a first position closing the face outlet and opening the foot outlet and a second position opening the face outlet and closing the foot outlet. A bypass passage allows air flow around the door when the door is in the second position to allow a specified amount of air flow to the foot outlet when the door closes the foot outlet.

Abstract: A heating, ventilation and air conditioning system includes a blower unit that has an interior air intake and an exterior air intake. Three doors are moved between open and closed positions to define a recirculation mode, a fresh mode and a partial recirculation mode. As the doors move between their open and closed positions, a variable partial mode and a variable fresh mode are defined.

Abstract: A heating, ventilation and air conditioning system includes a blower unit that has a first interior air intake, a second interior air intake and an exterior air intake. Three doors are moved between open and closed positions to define a recirculation mode, a fresh mode and a partial recirculation mode. As the doors move between their open and closed positions, a variable partial mode and a variable fresh mode are defined.