Air conditioning system control valve

摘要

A combined mode and temperature control valve for an HVAC housing includes a cylindrical sleeve rotatable within a stationary barrel. Hot or cold air enters lengthwise inlet slots in one side of the barrel located below or above a stationary dividing baffle in the housing. Air entering the barrel can exit to either a heater outlet, defroster outlet, or A/C outlet. The sleeve includes slots and openings which, when rotated continuously through a predetermined increment, open and close the hot and cold inlets in complementary fashion to allow in a full temperature range of hot or cold air, which mixes inside the hollow cylinder. The sleeve opens only one outlet at a time, blocking the other two, over the increment of rotation.