Refrigeration – Automatic control – Of external fluid reheating
Patent
1979-03-19
1981-06-02
Wayner, William E.
Refrigeration
Automatic control
Of external fluid reheating
62182, 62203, 236 1E, F25B 2900, F25B 4100
Patent
active
042703620
ABSTRACT:
Temperature and humidity electrical/electronic control circuits and apparatus to maintain a room at a constant temperature and humidity. The control system is adapted to an environmental condition controller for year-around cooling utilizing a liquid recirculating to an outside coil for free cooling or free reheat dehumidification. The controls provide a sequencing function to actuate one or more temperature and/or humidity conditioners in response to the degree and percentage of change. The circuit provides a ramp function signal for proportional control over an initial temperature range of free cooling and step controls over other predetermined temperature ranges. The circuit comprises a high fidelity ramp generator linearly responsive to the degree of temperature change up to a predetermined set point. A dehumidification signal is developed and fed to the same ramp generator to carry out air cooling to remove moisture. The system provides a reheat ramp signal operable, in accordance with the need for reheat, along with a staging of auxiliary heating feature.
REFERENCES:
patent: 1863576 (1932-06-01), Morse et al.
patent: 2279657 (1942-04-01), Crawford
patent: 3525385 (1970-08-01), Liebert
Feeney Edward K.
Kesterson Albert O.
Lancia Frederick N.
Liebert Ralph C.
Liebert Corporation
Mueller, Jr. Jerry K.
Smith Gerald L.
Wayner William E.
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