Automatic temperature and humidity regulation – High and low temperature alternate
Patent
1993-02-11
1994-02-15
Wayner, William E.
Automatic temperature and humidity regulation
High and low temperature alternate
165 111, G05D 2300
Patent
active
052859614
ABSTRACT:
The present invention relates to a means for preventing unnecessary expense in operation of a heating, ventilation and air conditioning system (HVAC) especially in areas wherein occupancy may be sporadic and where the occupants of such areas may not be personally concerned with keeping the expense of running such systems at a minimum. To accomplish this the present invention provides for at least two thermostatic controls within such area, one of such controls having fixed limits for the ambient temperature within the area while the other has variable limits therefor. The fixed limit control is locked and only accessible for adjustment by authorized personnel having the key to such lock. The variable limit control is actuated to override the fixed limit control through the operation of relay switches initiated by an infrared motion sensor unit positioned within such area. When motion is detected by such unit, it causes switches to be thrown cutting out the fixed limit control and bringing the variable limit control on line. A timer is connected to keep the variable limit control operable for such time as may be considered reasonable or desirable whereupon at the expiration of such time, operation will revert back to the fixed limit control.
REFERENCES:
patent: 4060123 (1977-11-01), Hoffman et al.
patent: 4223831 (1980-09-01), Szarka
patent: 4462540 (1984-07-01), Dytch
patent: 4623969 (1986-11-01), Bensoussan
Bender S. Michael
Wayner William E.
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