Air conditioning system control valve

Details Air conditioning system control valve Air conditioning system control valve

1993-11-05

1995-03-21

Joyce, Harold

Ventilation

Vehicle

Condensation preventer

454121, 454159, B60H 126

Patent

active

053991206

ABSTRACT:
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.

REFERENCES:
patent: 2634669 (1953-04-01), Greenmun
patent: 4216822 (1980-08-01), Izumi
patent: 5025711 (1991-06-01), Cassidy
patent: 5062352 (1991-11-01), Ostrand
patent: 5070770 (1991-12-01), Cassidy

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