Refrigeration – Automatic control – Humidity sensor
Patent
1996-03-01
1997-10-14
Wayner, William E.
Refrigeration
Automatic control
Humidity sensor
165223, 236 44C, B60H 120, F24D 1100
Patent
active
056759797
ABSTRACT:
A controller for a climate control system has a relative humidity sensor as well as a dry-bulb temperature sensor within the enclosure. The humidity value is used in conjunction with the dry-bulb temperature to generate an enthalpy error signal which is a function of both the dry-bulb temperature and the relative humidity values. This permits robust control of both enclosure temperature and enclosure humidity without abnormal cycling of the climate control system. Instead of using a sensor which directly measures the enthalpy, the enthalpy can be synthesized from the relative humidity and dry-bulb temperature within the enclosure. Alternately, the sensed and set point enthalpy values can be synthesized from any two thermodynamic properties of the moist air within the enclosure.
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Honeywell Inc.
MacKinnon Ian D.
Wayner William E.
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