Patent ID: 11884126
Assignee: AIR INTERNATIONAL (US) INC.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 14:
15. An HVAC system, comprising:
an evaporator:
a heater;
a plurality of outlets;
a sliding control door downstream of the evaporator and configured to allow air to flow across one or both of a heated path across the heater and a bypass path bypassing the heater; and
a sliding stratification door downstream of the control door and positionable to, in an intermediate position, direct the air flowing through the bypass path to be mixed within a bypass cavity with the air that flowed across the heated path before flowing out of the plurality of outlets;
wherein,
in a full cold position, the stratification door is in a retracted position within an upper exit cavity to unobstruct the bypass path;
the plurality of outlets includes a defrost outlet and an upper vent outlet;
the upper exit cavity is provided fluidly between the bypass cavity and the defrost outlet and upper vent outlet;
when the stratification door is in the retracted position, a maximum distance between a surface of the stratification door and an interfacing inner surface of the upper exit cavity is 0-50 mm; and
in the intermediate position, air flowing across the bypass path flows between a convex surface of the control door and a concave surface of the stratification door and toward a lower portion of a bypass cavity, where the air is then mixed with the air that flowed across the heated path.