Heat exchange – Movable heating or cooling surface – Rotary drum
Patent
1992-04-14
1992-11-10
Ford, John K.
Heat exchange
Movable heating or cooling surface
Rotary drum
165 27, 236 1B, 236 1C, 236 493, F25B 2900, F24F 700, F24F 3044
Patent
active
051616084
ABSTRACT:
An air conditioner for a building having a plurality of rooms has heating and cooling modes. A duct system connects the air conditioner to the individual rooms. A plurality of control valves are coupled to the duct mens for individually controlling the flow of air to each room. A first circuit is provided for generating a heating or cooling request signal from each room. A second circuit is provided for summing the number of the heating and cooling requests and providing summation signals of each. A third circuit is provided for sensing the greater of the two summation signals and activating the air conditioners to the mode corresponding to the greater of the summation signals. A fourth circuit is provided for activating the control valves controlling flow to the rooms which do not provide a part of the greater summation signal to the closed position. Additionally, a fifth circuit is provided for sensing changes in the summation signals when said air conditioner is in one of the modes and resetting the third circuit if the lesser of the summation signal becomes the greater summation signal.
REFERENCES:
patent: 3612164 (1971-10-01), Miner
patent: 3724534 (1973-04-01), Weatherston
patent: 4009825 (1977-03-01), Coon
patent: 4487363 (1984-12-01), Parker et al.
patent: 4530395 (1985-07-01), Parker et al.
patent: 4646964 (1987-03-01), Parker et al.
patent: 4819716 (1989-04-01), Beachboard
patent: 4830095 (1989-05-01), Friend
patent: 4886110 (1989-12-01), Jackson
patent: 4890666 (1990-01-01), Clark
patent: 4932466 (1990-06-01), Foster
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