Supply airflow control for dual-duct system

Details Supply airflow control for dual-duct system Supply airflow control for dual-duct system

1988-07-25

1990-04-17

Ford, John

Heat exchange

Movable heating or cooling surface

Rotary drum

165 27, 165 22, 165 16, 236 493, 236 13, F25B 2900, F24F 3052

Patent

active

049171747

ABSTRACT:
Two variable position supply air valves, one for modulating warm airflow to a comfort zone and the other for modulating cool airflow, each have a constant intermediate open position to provide at least a desired minimum airflow, and both can be controlled so that only one valve is open at any one time to minimize any mixing of the airstreams. Potentiometers are used to adjust the intermediate open position of each valve and to adjust at least one valve's relationship of valve opening to zone temperature.

REFERENCES:
patent: 2970768 (1961-02-01), Curran
patent: 3568760 (1971-03-01), Hogel
patent: 3934795 (1976-01-01), Ginn et al.
patent: 4136732 (1979-01-01), Demaray et al.
patent: 4182484 (1980-01-01), Stanke et al.
patent: 4244517 (1981-01-01), Stanke et al.
patent: 4422571 (1983-12-01), Bowman
patent: 4495986 (1985-01-01), Clark et al.
patent: 4534406 (1985-08-01), Newell, III et al.

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