Heat exchange – Movable heating or cooling surface – Rotary drum
Patent
1982-04-05
1983-11-08
Wayner, William E.
Heat exchange
Movable heating or cooling surface
Rotary drum
236 51, 34082506, F24F 300, G05D 2300
Patent
active
044136722
ABSTRACT:
A central desk air conditioning control system wherein each individual room unit is connected to a central desk location by a pair of control conductors. At the central desk location a SPST switch is connected across each pair of control conductors and effective, when closed, to place the connected individual room unit in a low energy mode. In the low energy mode, power relay drivers for major energy-consuming loads such as refrigerant compressors and electrical resistance heaters are disabled, while other loads, such as fans and control circuitry, remain energized. For the event that voltages are inadvertantly connected to the control conductors, a protective network is included in each individual room unit to prevent damage to its circuitry. The control circuitry for each individual room unit includes "Freeze Sentinel" circuitry for energizing a heating load when required to ensure that room temperature does not fall below 40.degree. F. regardless of user control settings. In the low energy mode the Freeze Sentinel circuitry continues to operate manually.
REFERENCES:
patent: 3871443 (1975-03-01), Jones
patent: 3979060 (1976-09-01), Tierce
patent: 4060123 (1977-11-01), Hoffman et al.
patent: 4077566 (1978-03-01), Bradford
patent: 4132355 (1979-01-01), Cleary et al.
patent: 4143813 (1979-03-01), Bryans
patent: 4174064 (1979-11-01), Pratt, Jr.
patent: 4206443 (1980-06-01), Britton
patent: 4284126 (1981-08-01), Dawson
patent: 4287939 (1981-09-01), Pohl et al.
General Electric Company
Giacalone Frank P.
Reams Radford M.
Wayner William E.
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