Air conditioning system control valve
US5399120A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1993 |
| Grant date | Mar 21, 1995 |
| Priority date | — |
| Expiry date | Nov 5, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60H1/00685
- WIPO fieldTransport
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.