Automatic temperature and humidity regulation – Ventilator type
Patent
1981-08-05
1983-04-12
Wayner, William E.
Automatic temperature and humidity regulation
Ventilator type
236 94, 374170, G05D 2300, G01K 700
Patent
active
043795200
ABSTRACT:
In order to permit in a simple manner the use of a digital processing unit in a regulating system for an air conditioning or heating plant, each temperature sensor of a temperature-measuring device is connected to a capacitor so as to charge it with a current proportional to the measured temperature. The capacitor is connected to one input of a comparator, and a reference voltage is applied to the other input. The output of the comparator is applied to an input of a digital processing unit which, at the start of the temperature measurement, will discharge the capacitor over a predetermined period and will then, at uniform time intervals, check the output signal supplied by the comparator for change. The number of samplings from the end of capacitor discharge until the time a change in the comparator output occurs is available as a digital value corresponding to the measured temperature.
REFERENCES:
patent: 4176556 (1979-12-01), Takenaka
patent: 4206648 (1980-06-01), Tuska et al.
patent: 4277975 (1981-07-01), Pinkham
patent: 4315413 (1982-02-01), Baker
Bauteile Report, vol. 12, No. 6, 12/1977.
Alex Friedmann Kommanditgesellschaft
Wayner William E.
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